Features: 1. Premium quality materials made, comfortable and breathable. 2. Full range of flexibility provides a more fit and more comfortable support on the knee. 3. Suits for sports wear, such as basketball, volleyball, running, etc. 4. With silicone anti-slip strap, comfortable to wear, better protect you. 5. Comfortable and easy to put on and take off, bring your knee a better support. 6. With spring support, easy and convenient to save much more efforts when doing sports. Specifications: Materials:nylonsiliconespandex Size Length Upper Circumference Bottom Circumference Suitable Weight M:28cm 34cm-54cm 30cm-50cm 50kg-65kg L:28cm 36cm-58cn 32cm-54cm 65kg-75kg XL:28cm 39cm-62cm 34cm-58cm 75kg-100kgPackage List: 1 x Knitting Knee Pads