Bell Women's Strut Sport Helmet Extended Fusion In-Mold Microshell is the result of an in-molding process which bonds the helmet's Microshell to its EPS foam layer for a sturdier, more solid helmet and extra coverage 15 generous vents bring cool air in through the front, allowing it to pass over your head and then flushes warm air out of the rear ports -- so YOU stay cool and your HEAD stays cool Removable visor attaches to the Robust Snap-In Visor Port and shields your eyes from sun, rain and debris ErgoDial fit system provides easy, one-handed adjustment for firm, snug and comfy stability Cam-Lock levers adjust the straps around the ears