The plastic shell of the Edge helmet is made with U-shaped ribs that are folded six times to reinforce the helmet structure. Massive vents create unprecedented low speed ventilation, moisture evacuation, and cooling required of mountain bike helmets. Internal frame system enables the huge vents to be created without jeopardizing protection. - Weight: 9.2 oz/260 g - Certifications: CPSC-ASTM - Vents: 22 - In-Mold Construction: Industrial process binding the microplastic and polystyrene together to add superior mechanical properties to these materials. - Inner Nerves Technology: Internal frame system reinforces the helmet's structure and enables huge vents to be created without jeopardizing protection. - Spiderlock SL: So light, this rack-and-pinion system can be adjusted using one hand to stabilize the helmet around the head. It is provided with an ergonomic foam padding. - Steplock Divider: Cam locking device to quickly adjust strap position. - Sealed Airdry Padding: Washable sealed adjustment padding for enhanced durability, ergonomic design for optimum comfort. - U-Bar Technology: Highly inspired by the Exo-Nerv technology, the plastic shell is made with U-shaped ribs: the plastic is folded 6 times. These ribs act like a complex exoskeleton that reinforces the helmet structure. - V-Pro System: Receptacle molded into the helmet in order to put on and off the visor as often as you wish. Plastic plugs are included to fill the holes when not used. - Edge Visor: Specifically designed for the Edge helmet, this visor perfectly adapts to the design. Can be installed with the included V-Pro system.