The Dakine Slayer Knee Pads set the standard for lightweight, pedal friendly and CE-certified knee pad design. Featuring dual-density DK Impact foam and a durable Cordura® outer, these pads maintain a breathable design that's light and comfortable enough for longer rides and hot weather. Their pre-curved shape and flexible foam design maintain a custom-fit feel, while silicon gripper cuffs ensure a slip-free fit. Integrated odour control helps fight the stink factor. How to measure: Slightly bend your knee. For the thigh measurement, measure around your leg 4 inches above your knee. For the calf measurement, measure around the fullest part of your calf. Sizing (in inches)XXSXSSMLXLXXL Top Cuff13-1414-1515-16.516-1818-19.519.5-2121-22.5Top of Calf10-11.2511-12.2512-13.513.5-1515-16.516.5-1818-19.5