This Apex Crystal Helmet can withstand high impact, with ventilation slots to allow the air to flow through from front to back. Padded longer sun visor with adjustable size band and dial system. Navy Helmet with Navy Crystal glitter panel top to extra sparkle. Size Xs 49 - 51cm, Sml 52 - 54cm, Med 55- 57cm, Lge 58 - 60cm,