Aerodynamic shell design constructed using an advanced poly-alloy for light weight and strength Cam pivot chin bar linkage system with latches for ease of movement and security Hypoallergenic and antimicrobial moisture wicking nylon interior is removable and washable Provides ample ear cavity space for most speaker systems Microlock (quick release) retention system Clear coat finish to protect paint and graphics Compatible with FX-111DS Snow Helmet breath box. HELMET FX111DS FRO-GY XS