Sizes: 90/90-21 54T
BOA 270 FIT SYSTEM: A fully adjustable design is engineered to help deliver an exact fit
Stretch finger gussets for enhanced mobility and moisture-wicking
Three intake vents and five exhaust ports for maximum airflow
Z1R Dirt Maxx Adult Off-Road Helmets bmx riding Sizes: 90/90-21 54TZ1R Dirt Maxx Adult Off Road Helmets Dual density EPS liner Fully removable polyester moisture wicking liner and cheek pad Injection molded polycarbonate shell D ring chin strap retention system 13 intake exhaust ports for maximum ventilation Colors: Matte Black, White Sizes: X Small, Small, Medium, Large, X Large, 2X Large SKU: 0110 9316, 0110 9317, 0110 9318, 0110 9319, 0110 9320, 0110 9321, 0110 9322, 0110 9323, 0110 9324, 0110 9325, 0110 9326,