Designed by girls for Derby skating- Extra wide palm splint for greater coverage and energy disbursement High-density, impact-resistant, replaceable splints positioned on front and back of wrists for support Sweatsaver™ brow-wipe on back of hand Terry cloth inside lining for comfort Reinforced double-stitching throughout Wristsavers Sizing Guidelines: To ensure a perfect wrist guard fit, measure hand circumference at the knuckles and match to the sizes listed below: S 19 - 20.3cm / 7.5 – 8.0 inches M 20.3 - 22.8cm / 8.0 – 9.0 inches L 22.8 - 25.4cm / 9.0 – 10.0 inches