Triple Eight Sweatsaver Liner Helmet is a classic helmet designed for skateboarding and roller skating. The design incorporates an ABS outer shell with a stink-free, moisture-wicking Sweatsaver liner inside. Adjustable chin strap ensures a comfortable fit. Sweatsaver liner is easily-removable for cleaning; wash gently by hand and air dry. The Triple Eight Sweatsaver Helmet is available in five sizes: Small fits 20.6–21.3 in (52–54 cm), Medium fits 21.4–22 in (54–56 cm), Large fits 22.1–22.9 in (56–58 cm), X-Large fits 23–24 in (58–61 cm), XX-Large fits 24-25 in (60–62 cm). To determine proper size, measure with a soft tape measure or string. Plush sweatsaver pads are designed to fit very snug when they are brand new, and will break in for the optimal fit. Expect to wear for a couple of hours before the helmet is completely broken in. Pro Tip: If your measurements are in-between the sizes shown, we strongly recommend sizing up to the larger size. Manufacturer’s 180-day limited warranty. This product is NON-CERTIFIED and is NOT intended for use as a bicycle helmet. This product has NOT been tested under CPSC, ASTM, or CE safety standards.