100% SATISFACTION GUARANTEE: We offer 100% no risk money back guarantees if you’re not thrilled with your purchase for any reason. Just tell us and we will do our best to give you the most satisfactory solution. Sizes vary from difference brands. Use the size chart on the picture as a reference. If your measurements are between sizes, go to a bigger size. HUMANIZED DETAILS: Two non-slip silicone strips avoid sleeves up and down sliding and tumbling by exercise. The thickened upper and lower cuffs fit tightly to the leg without limiting your mobility. Breathable fabric keeps your leg dry and odor free. COMFORT & PREMIUM QUALITY: 4-Way stretch fabric provides optimal compression to boost circulation and shorten the recovery time, while also avoiding the itchiness common to neoprene supports. High-precision 3D knitted technology ensures 360°perfectly fit your kneecap. Help you get the support you need with all day and all night comfort. EXTRA SUPPPORT: The adjustable elastic straps with Velcro maintain joint stability and reduce risk of injury to keep you moving with confidence, while still being comfortable during demanding sports. The straps are removable so knee sleeves can be used alone as your needs. Always attach the Velcro to the strap, don't stick to the fabric, avoiding damage your sleeves. TARGETED PROTECTION: Beister knee sleeves apply stable support across your knees joint and afford a full range of motion, significant pain relief for meniscus tear, arthritis, joint pain, ACL, injury recovery. Widely used in many sports such as Running, Weightlifting, Jogging, Squats, Basketball, Volleyball, Cross Fit, Tennis and more! Universal for men & women.