187 Killer Pads Pro Skate Helmet with Sweatsaver Liner is a classic helmet designed for skateboarding and roller skating. It has the world's most plush, comfortable, washable Sweatsaver Liner. This rugged ABS helmet shell with a one-of-a-kind full-coverage liner of interlocking foam. The helmet includes a revolutionary fit kit to fully customize the 187 Killer Pads helmet's fit along with a multi-point strap adjustment and a no-pinch buckle and no-sweat air vents. Available in five sizes: S – 52-54cm / 20.5 – 21.25”, M – 54-56cm / 21.25 - 22”, L –56-58cm / 22”- 23”, XL –58-60cm / 23 - 23.75”, XXL –60-62cm / 23.75 – 24.5”. 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. 180 day manufacturer's 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.