Classic skate helmet for kids, youth, and adults, with ABS outer shell and stink-free, moisture-wicking Sweat saver liner Ideal for skateboarding, roller skating, and roller derby Included Sweat saver liner attaches with hook-and-loop tape and is easily-removable for cleaning; Adjustable chin strap Available in six sizes: XS fits 20. 120. 5 in (5152 cm), S fits 20. 621. 3 in (5254 cm), M fits 21. 422 in (5456 cm), L fits 22. 122. 9 in (5658 cm), XL fits 2324 in (5861 cm), XXL fits 24-25 in (6062 cm) To determine proper size, measure with a soft tape measure or string; manufacturers 180-day limited With its timeless design, killer color range and our unique rubber finish, the Brainsaver is a staple of our helmet collection. And with our stink-free, moisture-wicking Sweatsaver Liner inside, its a helmet youll use for years to come. Sweatsaver replacement liners are also sold separately in various colors to customize your helmet. Multi-impact design ABS Outer Shell with our renowned Sweatersaver Liner for comfort. Ideal for: Skateboarding; Scooters, In-Line Skating/Rollerblading; Roller Derby To ensure a perfect fit, measure the circumference of your head starting in the middle of your forehead and match it with the sizes below: XS 20.10 20.50 in (51 52 cm) S 20.60 21.30 in (52 54 cm) M 21.40 22.00 in (54 56 cm) L 22.10 in 22.90 in (56-58cm) XL 23.00 24.00 in (58 61 cm)