A new slant on helmet design, this helmet has 21 huge vents that do more than just look cool - they keep you cool! In-Mold microshell adds durability. ErgoDial fit system provides a perfect fit whether on or off the beaten path. Orange (ORG), Black (BLK), Blue (BLU), Red (RED). Universal sizing: 21 1/4" - 24". Wt: 10.6 oz.