COSVER Outdoor Sport Knee Pads High Elastic Wicking Fabric Non Slip for Basketball Football Volleyball Hockey and Tennis (One Pair) (Black-short, Medium) PRODUCT SIZE -- Measure around largest part of knee. You can refer to picture size table, choose your size Honeycomb Compression Pad Design -- Professional honeycomb compression pad design to protect leg and knee against impact, consistent with the knee contour designcreate excellent freedom of movement and help your joints and muscles to stay warm while providing strong support Lightweight and Comfortable Fabric -- The fabric is bibulous and good breathable, the maximum extent to reduce the sense of restraint structure , protect your leg and knee from getting hurt during in outdoor activities ,suitable for running, basketball, football, cycling, golfclimbing and so on Non-Slip Inner Silicone Strip -- No worries if the sleeve will stay in place. A hidden, soft silicone strip hides inside at the top and bottom that prevents the knee pad from slipping down when moving or getting sweaty Customer Service -- Lifetime Breakage Warranty and 30 Day Money Back Guarantee,You have no risk to try and we will provide you the best service!