TMS Adult BLACK CARBON FIBER MOTOCROSS HELMET MX DIRT BIKE ATV MX Gear (Large) Beautiful Gloss UV protective finish and DOT approved Light weight extremely durable composite shell Heavily cushioned and very comfortable interior Removable and washable padding; Well vented all purpose product for off-road riding. Goggles Size: One Size(Adult); Helmet Size: Large(Adult): 23" - 23 1/2"; Hat size: 7 3/8 - 7 1/2 Medium(Adult): 22 1/4" - 22 3/4"; Hat size: 7 1/8 - 7 1/4 S size: 21 1/2" - 22" Hat size: 6 7/8 - 7 XL size: 23 3/4 - 24 1/4; Hat size: 7 5/8 - 7 3/4