The Sleeve construction offers a compressed fit to make sure everything stays in place while biking

ADDED FEATURE: Clamp for front reflector

X-SYNC wide-tooth

putting it right on the dimple that allows air to move between the positive and negative air chambers

500 AF Delrin pulley material features a high mechanical tensile strength and rigidity

Fox Proframe Helmet - M - Rizer - Dark Shadow PLP|Riding Style The Sleeve construction offers aBreathable full face mountain bike helmet. Conquer the mountain with this full face protection specialist. The Proframe Clyzo Helmet is the original full face trail helmet and is still the market leader. Designed to meet the needs of all mountain riders and enduro racers, it packs Mips technology into a superlight shell. Mips added protection system has been proven to reduce the rotational motion when implemented in a helmet by absorbing and