CLOSEOUTS . Giroand#39;s Xar mountain bike helmet rules on long, technical rides and quick singletrack jaunts. 17 vents and Wind Tunnel technology keep your head cool and protected, and the adjustable visor helps keeps you focused on changing terrain. Available Colors: HILIGHTER YELLOW/BRIGHT GREEN, MATTE GREEN/BLACK BLOCKADE, WHITE/ORANGE BLOCKADE, MATTE BLUE MC HESHER, TITANIUM/BLACK SIXTEEN BARS. Sizes: S, M, L.