The OF-77 now with Quick Release Buckle features SpaSoft interior which combines the moisture wicking properties of COOLMAX CORE technology with the anti-microbial properties of bamboo. The OF-77 is like having two helmets in one. It offers the comfort of an open face helmet with the ability to quickly and easily convert into a full face helmet with the installation of the optional snap-in jaw piece. Peak visor and removable jaw sold separately