Giro Switchblade MIPS Helmet:The Switchblade MIPS is our new ASTM downhill certified full face helmet with a removable chinbar. Everything about the Switchblade is optimized for the descent, and that's why it's certified to CPSC, EN- 1078 and ASTM-1952-DH with and without the chinbar. The chinbar is easy to remove--just push the buttons under the chinbar, rotate up, and remove and it's just as easy to reinstall. The Switchblade MIPS features the new Roc Loc Air DH fit system, which has a bumper around the dial to prevent accidental adjustments if your helmet contacts your backpack or neck brace all while keeping you cool. When the chinbar comes off, Wind Tunnel cheek pad ventilation adds even more cooling power as you start to climb. Specs & Information Features: Removable chinbar, P.O.V. Plus visor, Spare visor with camera mount Hydrophilic x -Static anti-microbial padding, Certified to CPSC, EN-1078 and ASTM-1952-DH with & without chinbar, MIPS equipped Construction: In-mold construction Fit System: Roc Loc Air DH system Ventilation: 20 vents with internal channeling, Wind Tunnel cheek pad ventilation (8)