Adventure Awaits Bell's all-new Piston is casual in its approach, but all-business when called upon for duty. Featuring Bell's Fusion In-Mold construction, ErgoDial fit system, easy-to-adjust Cam-Lock levers, 15 extra-large vents, and a snap-in visor, the rounded profile fits perfectly with a more recreational attitude.
Universal Adult Size: 54-61 cm . 21.25" - 24"
ErgoDial Fit System
Robust Snap-In Visor
Extended Fusion In-Mold Microshell