Designed for those skaters that need more padding, our KP 22 knee pads combine durability, comfort and maximum padding that gets you back up after a fall. Features: Heavy duty EVA memory foam. High–density, impact-resistant cap securely attached with reinforced rivets. Neoprene butterfly closure. Top elastic and bottom webbed adjustable straps. Flat cap design for longevity and stability. To ensure a perfect knee pad fit, measure circumference of extended knee and match to the sizes listed below: JR 11 – 12.5 in (28 – 32 cm), S 12.5 – 14.5 in (32 – 36 cm), M 14.5 – 16 in (36 – 40 cm), L 16 – 17 in (40 – 44 cm), XL 17 – 19.5 in (44 – 50 cm).