Features of the O'Neal Defender 2.0 HelmetLightweight All Mountain / Enduro helmet with 2 shell sizesO'Neal Fidlock® magnetic buckle for easy, single-handed fastening and releaseWeight: 380g (±25g)Size adjustment with new micro-adjust 1 Hand Retention System including reflective stickerEasy strap adjustment for perfect individual fitSweat-absorbing and skin-friendly lining, detachable and washable (hand-wash)Oversized vents for maximum airflow and coolingAdjustable and detachable visorExceeds EN1078 safety standard for bicycle helmets