Giro: RUGGED ADVENTURER The Radix™ combines rugged style and durability to meet the demands of core trail riders, with the coverage, lightweight and ventilation riders need to ride comfortably and confidently, all day. The highly adjustable Roc Loc® 5 system allows you to customize fit/feel for enhanced stability and long-range comfort. The P.O.V.™ visor offers 15 degrees of adjustment, and the tough polycarbonate outer shell is fused permanently to the EPS foam liner using our In-Mold™ construction process, to enhance durability and ventilation without excess bulk. FEATURES:Deep coverageP.O.V.™ visorCool-fit anti-microbial paddingCONSTRUCTION:Full-wrap In-Mold polycarbonateshell with EPS linerFIT SYSTEM:Roc Loc® 5VENTILATION:25 Wind Tunnel™ vents withinternal channelingSUPER FIT™ SIZES:S 20”–21.75” / 51–55cmM 21.75”–23.25” / 55–59cm