Adults

Free Accident Replacement | 110% Carbon Offsets | Safety Certified Engineered for performance, the Chapter Collection integrates elevated utility into your daily riding uniform to always keep you moving forward. MIPS Add an extra layer of protection with the integrated Mips safety system, designed to reduce the rotational motion of certain impacts that may otherwise be transferred to your head. MULTI-USE MAGNETIC LIGHT Ride smoothly from day to night with an included 30 lumen taillight that magnetically attaches to the helmet or multi-use adapter. PREMIUM VISORS Reduce glare and increase your field of vision with visors in elevated finishes, including hand-painted tortoise shell, matte black, and metallic rose gold. SECRET POPLOCK The most convenient and secure way to leave your helmet behind. Access the hidden channel behind the logo mark, and thread your U-lock or chain lock through. Backed by our Anti-Theft Guarantee. ACTIVE VENTILATION 8 strategically placed vents actively capture airflow and pass it through the interior cooling channels – developed to keep you cool on your long rides. - Integrated Mips Safety System for added protection against rotational forces - 30 lumen magnetic taillight with 1 hr runtime solid, 2 hrs flash - Multi-use adapter to attach the taillight to your bike - Visors in premium finishes to increase your field of vision - Secret PopLock for securing your bike helmet with your lock - Integrated dial fit system for precise adjustments - One-handed magnetic fastener and nylon straps - Active ventilation with 8 vents and internal channeling - Lightweight helmet at 360g (S), 370g (M), or 410g (L) - Navy blue shell with hand-painted tortoise shell visor - Complies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older - Certified for CE and CPSC standards for cycling

Free Accident Replacement | 110% Carbon Offsets | Safety Certified Designed for urban cycling and skating, the minimalist Heritage bike helmets are our original collection, inspired by the simplicity of vintage moto lids and the heritage colorways of the 50s and 60s. SECRET POPLOCK The most convenient way to leave your helmet behind. Access the hidden channel behind the logo mark, and pop your U-Lock or chain lock through. Backed by our Anti-Theft Guarantee. MAGNETIC BUCKLE Lock it in with a one hand fastener guaranteed to leave your finger pinch-free. Safety certified, German engineered. DIAL FIT SYSTEM Dial in the proper fit for every ride. With our easily adjustable fit system, you can be confident that your helmet is snug and secure. VEGAN LEATHER STRAPS Stay comfortable and sweat-free with these eco-friendly microfiber vegan straps, created with animals and the environment in mind. VENTS Ventilation without the sci-fi design. You'll keep cool with seven air vents and three cooling channels. - Secret PopLock for securing your bike helmet with your lock - Vegan leather straps - Integrated dial fit system for precise adjustments - One-handed magnetic fastener - 7 vents with internal channeling - A built-in low-profile visor - Inspired by vintage motorcycle designs with a black shell and white moto trim - Lightweight helmet at 410g (S), 460g (M) or 490g (L) - Complies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older - Certified for CPSC and ASTM standards for cycling and roller skating, and skateboarding

The Nutcase Street Helmet collection combines the industry leading safety feature MIPS with original Nutcase inspiring designs. Featuring an improved retention system to provide a secure, comfortable fit and 2x the reflectivity for visibility on the road. 11 air vents increase the airflow to keep your brain cool and creative designs to keep you looking even cooler. - Equipped with MIPS (Multi-directional Impact Protection System) designed to reduce rotational forces that can result from certain impacts - High performing injection molded ABS shell and tuned EPS foam to keep you safe on the road - Improved ventilation to keep you cool - Premium Fidlock magnetic closure for one handed snap and go buckle - 3 piece internal heat sealed pads to provide next to brain comfort - Simple dial adjustable fit system provides safety, individualized fit and comfort - 2x reflectivity for increased visibility on the road - Eleven vents with internal channels in EPS for ventilation - Visor Included - CPSC 16 CFR 1203 and ASTM F1492 certified for cycling, scooting, and skating

- COB LED Technology: it's a more compact footprint while delivering a higher intensity of light, meaning you'll be seen from farther away and gives the lights a more uniform look - The helmet will be equipped with 98 COB LEDs in total - Front Light (30 COB LED diodes) - Rear Lights with Turn Signals (34 red COB LED diodes, 34 orange COB LED diodes) - 1100mAh rechargeable battery providing up to 10 hours with the lights set on maximum brightness - USB-C Charging Connection (Chargeable with a 5V—5.2V & 0.5A charger) - Remote included for turn signal - Option to buy a Lumos Remote to activate Automated Brake Lights. (The Remote Lite included with Ultra doesn't come with an accelerometer and can only be used to activate turn signals) - Lumos Companion App: Customize your light flashing patterns, check your battery life, track your activity, and sync with Strava and Apple Health - Maximum Venting - Fits: 21.3 – 24" (54 – 61cm)

With authentic off-road style and a comfortable fit, this helmet deLivers it all for aspiring adventurers. Integrated features including a camera mount and compatibility with the Giant Numen Link taillight make it easy to customize your ride. - We've got you covered! 1 year crash replacement program. - Trail specific design. Purpose built for aggressive trail and enduro riding. Rail features a new shape with extended rear coverage. - A total of 18 vents with straight, non tapered walls, designed and positioned for off-road performance. The size and shape of the vents helps guide airflow through interior channels to maximize ventilation at low and high speeds for better cooling - Cinch Pro Fit system. - Integrated magnetic mount for the Numen+ Link and Recon TL - MIPS mimics the brain's own protection system by adding a low friction layer between the head and the helmet reducing rotational violence that causes strain to the brain at angled impacts

Inspired by gravity riders and presenting a modern mountain biking style, this off-road helmet is designed with generous ventilation and added protection Along with essential safety features like MIPS technology, we’ve added a lower rear coverage design to shield more of the back of your head. Direct Flow Cooling channels are designed to pull in air to keep you cool during slow, challenging climbs or flowy descents. With a one-handed dial adjustment and rear fit system you get perfect head-hugging comfort. - Simple, clean and compact helmet shape - Optimized vent design for enhanced breathability - MIPS brain protection system and lower rear coverage - New 360° full surround fit-belt - Intuitive one-handed dial adjustment (Cinch ONE fit system) - Compatible with Alumbra taillight: Liv proprietary taillight docking station - In-molded construction for added strength - TransTextura moisture-wicking, anti-odor inner padding - Pony-tail friendly rear fit system space - Detachable visor - S / M (49-57cm), M / L (53-61 cm)

When it's time to hit the road, the Agilis MIPS offers a sporty, sleek style with comfortable features you can count on, including 32 wind tunnel vents, Coolfit anti-microbial padding, and integrated MIPS technology. The fit on the Agilis MIPS is comfortable and secure thanks to our adjustable Roc Loc 5.5 MIPS system that combines fit and positioning adjustments while integrating with MIPS technology for an added measure of protection in the event of an angled impact. The outer Hardbody shell extends to the inside of the helmet, and is molded from a tough polycarbonate thats fused permanently to the EPS foam liner using our In-Mold process to enhance durability and ventilation without excess bulk. - 32 Wind tunnel vents with internal channeling - Full-wrap in-mold polycarbonate shell with EPS liner - Coolfit anti-microbial padding - Featherweight webbing with Slimline buckle - Roc Loc 5.5 MIPS fit system

When it's time to hit the road, the Women's Agilis MIPS offers a sporty, sleek style with comfortable features you can count on, including 32 wind tunnel vents, Coolfit anti-microbial padding, and integrated MIPS technology. The fit on the Women's Agilis MIPS is comfortable and secure thanks to our adjustable Roc Loc 5.5 MIPS system that combines fit and positioning adjustments while integrating with MIPS technology for an added measure of protection in the event of an angled impact. The outer Hardbody shell extends to the inside of the helmet, and is molded from a tough polycarbonate thats fused permanently to the EPS foam liner using our In-Mold process to enhance durability and ventilation without excess bulk. - 32 Wind tunnel vents with internal channeling - Full-wrap in-mold polycarbonate shell with EPS liner - Coolfit anti-microbial padding - Featherweight webbing with Slimline buckle - Roc Loc 5.5 MIPS fit system

The Artex MIPS is a blast of fresh air in helmet design, offering an exceptionally compact road-race-inspired design coupled with a removable visor and slightly deeper coverage for riding trails and grinding out long miles on mixed-surface roads. The fit is luxurious and secure, thanks to Giro's highly adjustable Roc Loc 5 Air MIPS system that allows you to customize fit/feel for great stability and long-range comfort while providing an added measure of protection from rotational forces in the event of an angled impact. The outer shell is molded from a tough polycarbonate that’s fused permanently to the EPS foam liner using Giro's In-Mold construction process to enhance durability and ventilation without excess bulk.

Giro created the Bronte MIPS for riders in search of the renowned Giro fit and in need of an extra-large size. Inspired by the sleek style and cooling ventilation of the Register helmet, the Bronte MIPS is at home on pavement or the trail. In-Mold construction is used to make it light without compromising durability, and the acclaimed, adjustable Roc Loc Sport MIPS system makes it easy to custom-tune the fit for comfort and stability. An integrated Multi-Directional Impact Protection System, which can redirect energy and provide more protection in certain impacts, ensures that you get the latest in head protection technology.

The Caden MIPS II offers a sophisticated style with advanced head protection technology, making it a perfect match for your on-the-go lifestyle. A sleek In-Mold shell helps keep Caden lightweight, and the Roc Loc City MIPS fit system makes fit and feel adjustments almost effortless. Inside the helmet, MIPS technology can help to reduce rotational forces to provide more protection in certain impacts. Thoughtful details include reflective accents, a lock port for securing the helmet with your bike or a bag when you're on the move, and a TPU cycling cap-style visor that accents your style without compromising ventilation.

The Caden MIPS II offers a sophisticated style with advanced head protection technology, making it a perfect match for your on-the-go lifestyle. A sleek In-Mold shell helps keep Caden lightweight, and the Roc Loc City MIPS fit system makes fit and feel adjustments almost effortless. Inside the helmet, MIPS technology can help to reduce rotational forces to provide more protection in certain impacts. Thoughtful details include reflective accents, a lock port for securing the helmet with your bike or a bag when you're on the move, and a TPU cycling cap-style visor that accents your style without compromising ventilation.

When your trail rides include technical descents and challenging climbs, the Giro Chronicle MIPS provides all the essential performance and protection you need in an affordable package. It drafts off the design language of their premium Montaro MIPS helmet, and offers many of the key features. Its compact shape provides deep, confident coverage, and the Roc Loc 5 fit system allows you to easily dial in fit tension and adjust vertical position with a single hand. The Chronicle MIPS is designed for goggle compatibility, and the P.O.V. Plus visor allows you to lift the visor and place your goggles on the front of the helmet. The Coolmax padding has great wicking properties, and it’s extra plush to provide all-day comfort on the trail. The helmet was designed with MIPS, which redirects impact energy to provide more protection in certain impacts.

The Giro Cinder MIPS provides all the features an avid road rider wants in a lightweight package. The design is inspired by the classic aesthetic of their premium Synthe helmet, offering similar performance and style. Key features include the Roc Loc 5 fit system, which allows you to easily dial in fit tension and adjust vertical position with a single hand. Air-FX padding offers comfort on your longest rides, and the helmet is equipped with MIPS to redirect impact energy, providing more protection in certain impacts.

The Eclipse Spherical is both the fastest road helmet and the coolest aero road helmet Giro has ever created, bringing our best technologies together in a light, compact form that's ideal for road and gravel racing. The sleek outer shell actively streamlines airflow to reduce drag across multiple wind angles, while 14 Wind Tunnel vents pull air through the helmet to provide incredible cooling power that rivals our most aggressively vented road helmets. Inside, the ball-and-socket design of Spherical Technology is powered by the MIPS brain protection system, which allows the helmet's outer EPS foam liner to rotate around the inner foam liner during a crash to help redirect impact forces away from the brain. Progressive Layering of both the inner and outer liners help to offer more comprehensive protection, too. The patented Roc Loc 5 Air system enhances stability and fit, and plush antimicrobial Ionic+ padding helps absorb sweat and moisture while providing durable antimicrobial performance.

The Escape MIPS is the ideal choice for today's on-the-go lifestyle. The sleek shape of the Escape MIPS offers great ventilation and deep coverage, with a durable ABS plastic shell and integrated, rechargeable LED lights front and rear. The integrated front light offers bright "be seen" white light while the rear light shines bright red for substantially increased visibility to drivers and other road users. The fit is luxurious, with an adjustable Roc Loc Sport MIPS system that provides superior fit comfort with enhanced stability at the turn of a dial. The Escape MIPS also is equipped with an Integrated MIPS brain protection system, which can help to redirect impact forces to provide an additional measure of protection in certain impacts.

A lightweight in-mold design with built-in front and rear LED lights and remote handlebar-activated turn signals is the perfect accessory for the daily commute through the urban jungle. STANDOUT STYLE WITH BOLD VISIBILITY Choose to ride, choose to be seen. The Ethos™ Mips® is a revolution in transportation, with a compact and stylish form featuring the added protection of Mips® Brain Protection System highlighted by integrated LED front white lights, rear red lights, and amber turn signals, all controlled via an intuitive handlebar remote. The entire system is USB-C rechargeable with an estimated run time of 10 hours in low-blink mode and 5 hours in the high-blink mode, which delivers 45 lumens front and 30 lumens rear. Helmet and remote can be fully charged in just 2 hours and 1 hour, respectively. The Ethos Mips features a TPU soft rubber waterproof brim. (The Ethos Mips also is available with a clear, molded eye shield as the Ethos Mips Shield). Despite the added technology, in-mold construction keeps the weight manageable, full hardbody coverage adds durability, and a Roc Loc® City Mips fit system plus quick-dry padding ensure comfort. Whether you're a dedicated bike commuter, running the kids to school on your e-cargo bike, or simply looking for added visibility as you ride around town, the Ethos Mips is a look into the future. Highlights: - Built-in front (white) and rear (red) LEDs - Handlebar-activated turn signals (amber/yellow) - Micro-USB C rechargeable - Deep coverage - Quick-dry padding

The Fixture MIPS brings confident mountain bike style and breezy ventilation together in a compact design that complements nearly any ride -- especially when there's dirt under tread. Some of Giro's best features, like In-Mold construction coupled with the ease and comfort of their acclaimed Roc Loc Sport fit system, offer the versatility you need to ride everything from fire-road adventures to swooping singletrack trails. The Roc Loc also is seamlessly integrated with the Multi-Directional Impact Protection System (MIPS), which can redirect energy and provide more protection in certain impacts.

Go big in the Fixture MIPS XL Helmet, made specifically for riders in need of an extra-large size who want breezy ventilation, the ease of the Roc Loc Sport fit system, and confident style. Inspired by the confident mountain style and breezy ventilation of our Fixture helmet, the Fixture MIPS XL is built around many of our best features, like In-Mold construction coupled with the ease and comfort of our acclaimed Roc Loc Sport fit system. Meanwhile, a seamlessly integrated Multi-Directional Impact Protection System, which can redirect energy and provide more protection in certain impacts, ensures that you have the latest in head protection technology, too. This makes the Fixture MIPS XL one of the best performance value mountain bike helmets available.

Giro design, and high-performance innovation for core road cyclists, gravel enthusiasts, and adventure riders. Advanced Performance for the Adventurous The heart of the Helios's extraordinary design and performance is Spherical Technology, which utilizes a ball-and-socket design powered by MIPS, the market-leading brain protection system that can help to reduce rotational forces. Spherical Technology allows the helmet's outer liner to rotate around the inner liner during a crash, and also allows Progressive Layering of the inner and outer liners to provide more comprehensive protection and performance. In addition to advanced head protection, the Helios's 15 Wind Tunnel vents provide exceptional cooling power that's enhanced by our patented Roc Loc 5 Air fit system and plush, antimicrobial XT2 padding for exceptional sweat absorption. It's the ideal match for your road and gravel adventures. Specs: - Impact Management: Spherical Technology, Powered By Mips - Construction: Independent, in-mold liners with spherical ball-and-socket design, Polycarbonate Shell, Hardbody Lower Shell - Ventilation:15 wind tunnel vents with internal channeling - Fit System: Roc Loc 5 Air - Weight: 270 (Size Medium CPSC, CE) - Certification: Complies with the US CPSC Safety Standard for bicycle helmet for persons age 5 and older E.U.: CE EN1078 - Highlights: Nanobead EPS Foam, Coolfit Antimicrobial Padding, Slimline Webbing, Four-piece shell w/lower hardbody

Sometimes the smartest designs also are the simplest. The Isode MIPS is an easy fit for riders who want classic style with the latest features, yet don’t want to spend a fortune or compromise comfort. The Isode includes several features found in Giro's premium helmets, like In-Mold construction to keep the weight low and the easy one-handed adjustments of their acclaimed Roc Loc Sport MIPS system, for a sure fit at the turn of a dial. It’s the perfect companion for your riding, no matter how fast or how far you ride. The Isode MIPS helmet includes several features found in our premium helmets, like In-Mold construction to keep the weight low and the easy one-handed adjustments of our acclaimed Roc Loc Sport MIPS system, for a sure fit at the turn of a dial. It's the perfect companion for your riding, no matter how fast or how far you ride.

The Radix MIPS helmet combines rugged style and durability to meet the demands of core trail riders, with the coverage, lightweight, and ventilation riders need to ride comfortably and confidently, all day. The Radix MIPS helmet is for the rugged adventurer who appreciates a perfect fit, the sun staying out of their eyes, and plenty of ventilation. The highly adjustable Roc Loc 5.5 MIPS system allows you to customize fit and feel for enhanced stability and long-range comfort while providing an added measure of protection from rotational forces in the event of an angled impact. The P.O.V. Visor offers 15 degrees of adjustment, and the tough polycarbonate outer shell is fused permanently to the EPS foam liner using our in-mold construction process, to enhance durability and ventilation without excess bulk. - Construction: Full-wrap in-mold polycarbonate shell with EPS liner - Sport: Cycling - Number of vents: 25 - Ventilation type: Wind tunnel vents with internal channeling - Fit system: Roc Loc 5.5 MIPS

The Register MIPS helmet combines sleek design and lightweight construction to match your style, on the road or trail. Made in a comfortable Universal Fit size with Giro's convenient Roc Loc Sport fit system, the Register MIPS adjusts with a simple turn of the dial so you can tune the fit in seconds. A range of colors lets you choose exactly how your on-bike style comes together. Register MIPS models also have an integrated Multi-Directional Impact Protection System, which can redirect energy and provide more protection in certain impacts.

The Source MIPS helmet combines advanced performance and protection in a rugged, trail-ready design. Featuring deep coverage with aggressive ventilation from 16 vents coupled with deep internal channeling, it helps keep things cool even when the riding gets rowdy. And with the comfort and secure feel of the Roc Loc 5 fit system with Integrated MIPS brain protection, plus a moto-style adjustable screw-in visor and full lower Hardbody durability, you get a helmet that's capably equipped for fun and adventure. MIPS: - Integrated MIPS (Multi-Directional Impact Protection System)—allows you to customize fit/feel for great stability and long-range comfort while providing an added measure of protection from rotational forces in the event of an angled impact Construction: - In-Mold polycarbonate shell and EPS liner - Polycarbonate Hardbody lower shell Visor: - Adjustable moto-style screw-in visor Interior/liner type: - Coolfit anti-microbial padding Ventilation type: - 16 Wind Tunnel Vents with internal channeling Fit system: - Roc Loc 5 Impact liner type: - EPS foam liner Product weight: - 340g (size Medium)

The Giro Sutton MIPS is a low-profile design loaded up with clever features to help urban riders and commuters get more out of their ride, and now it's available with the Roc Loc City fit system. This fit system has three positions of vertical adjustability, and a comfortable, rubberized dial to adjust tension. It is made of a flexible and durable material to avoid damage while being locked up. The Sutton also features a tough outer shell and a soft visor. An integrated light clip at the back allows you to snap your light to the helmet for enhanced visibility, and a reinforced vent becomes a durable lock port so you can lock your helmet to the bike for convenience. The Sutton is available with MIPS technology, which can redirect energy and provide more protection in certain impacts.

The Syntax MIPS combines a touch of European flair with slightly deeper coverage and high-performance features—all tucked into a very slim design. The outer shell is molded from a tough polycarbonate that’s fused permanently to the EPS foam liner using Giro's In-Mold construction process to enhance durability and ventilation without excess bulk. The fit is luxurious and secure, thanks to the highly adjustable Roc Loc 5 Air MIPS system that allows you to customize fit/feel for great stability and long-range comfort. Another benefit is integrated MIPS which can provide an added measure of protection from rotational forces in the event of an angled impact. MIPS - Integrated MIPS (multi-directional impact protection system)—allows you to customize fit/feel for great stability and long-range comfort while providing an added measure of protection from rotational forces in the event of an angled impact CONSTRUCTION - In-mold construction - Four-piece polycarbonate interlocking hardbody shell - Full hardbody wrap SHELL TYPE - Polycarbonate shell SPORT - Cycling NUMBER OF VENTS - 25 INTERIOR/LINER TYPE - Coolfit anti-microbial padding VENTILATION TYPE - Wind tunnel vents with internal channeling GENDER - Unisex FIT SYSTEM - Roc Loc 5 Air IMPS MIPS IMPACT LINER TYPE - EPS CERTIFICATION - US CPSC bicycle for ages 5+ - EU: CE EN 1078

The Synthe II MIPS is an icon of road helmet design, combining the performance advantages of a compact profile with great cooling power and luxurious comfort for road and gravel riders. The Synthe MIPS Helmet offers good looks in a slim design while offering more coverage on the back of the helmet for a little extra assurance. The compact form of the Synthe MIPS slips through the air with ease across multiple yaw and head angles and offers impressive cooling power. Key features include the Roc Loc Air fit system with 2-way fit tuning and Aero Mesh Panels with a dedicated port for securely docking sunglasses as you ride. The Synthe MIPS also has the Multi-Directional Impact Protection System, which we believe can redirect energy and provide more protection in certain impacts. - MIPS-equipped—to redirect impact energy, providing more protection in certain impacts: - Construction - In Mold construction - Thermoformed Sl roll cage reinforcement Shell type: - Polycarbonate shell - Number of vents: 26 Ventilation type: - Wind Tunnel Vents with internal channeling Fit System: - Roc Loc 5 Air Impact liner type: - EPS

The Vasona MIPS helmet combines sleek, lightweight design with an integrated Multi-Directional Impact Protection System (MIPS) that can redirect energy and provide more protection in certain impacts, giving you the latest in head protection on the road or trail. Made in a comfortable, Universal Fit women's size with Giro's adjustable Roc Loc Sport fit system, the Vasona's fit can be custom-tuned with a simple turn of the dial to make fitting fast and hassle-free. And with a range of colors to suit almost any style, you can choose exactly how your on-bike style comes together.

The Verce MIPS is Well Equipped to Help You Blaze New Trails. Our Roc Loc Sport Systems allows you to quickly and easily dial in your fit and the plush Quick Dry Padding provides a comfortable feel. The Verce MIPS also features an integrated Multi-directional Impact Protection System (MIPS), which can redirect energy and provide more protection in certain impacts. Integrated MIPS (Multi-directional Impact Protection System) - Allows you to customize fit/feel for great stability and long-range comfort while providing an added measure of protection from rotational forces in the event of an angled impact - Reflectivity: Reflectivity - Construction: In Mold Construction - Full Hardbody Shell - Shell Type: Polycarbonate Shell - Sport: Cycling - Visor: Removable Visor - Number of Vents: 18 - Interior/liner Type: Extra-plush Padding - Gender: Womens - Fit System:roc Loc Sport MIPS - Impact Liner Type: Eps - Certification: CPSC Bicycle

The Agilis W MIPS offers assured style and performance for women, with a sleek silhouette, airy design, and MIPS technology. The Agilis MIPS W is the right choice for women looking for a helmet that combines airy design with slightly deeper coverage and a host of performance features aimed at road and multi-surface riding. The fit is comfortable and secure thanks to our adjustable Roc Loc 5.5 MIPS system that combines fit and positioning adjustments while integrating with MIPS technology for an added measure of protection in the event of an angled impact. The outer Hardbody shell extends to the inside of the helmet, and is molded from a tough polycarbonate that's fused permanently to the EPS foam liner using our In-Mold process to enhance durability and ventilation without excess bulk. The fit is comfortable and secure thanks to our adjustable Roc Loc 5.5 MIPS system that combines fit and positioning adjustments while integrating with MIPS technology for an added measure of protection in the event of an angled impact. The outer Hardbody shell extends to the inside of the helmet, and is molded from a tough polycarbonate that's fused permanently to the EPS foam liner using our In-Mold process to enhance durability and ventilation without excess bulk. Specs: - Impact Management: Integrated MIPS - Construction: In-mold construction, Four-piece Polycarbonate Interlocking Hardbody Shell, Full Hardbody Wrap - Ventilation:Wind tunnel vents with internal channeling - Fit System: Roc Loc 5.5 MIPS - Weight: 300g (Size Medium CPSC); 280g (Size Medium CE) - Certification: Complies with the US CPSC Safety Standard for bicycle helmet for persons age 5 and older E.U.: CE EN1078