1. Keeps your knees and warm to relieve pain and prevent rheumatoid arthritis or knee osteoarthritis in the cold condition 2. PREVENTS INJURY The Knee sleeves helps athletes avoid joint pain. Knee compression sleeve also can provide arthritis pain relief, too. 3. FLEXIBLE&PRACTICAL - Suitable for cold season of outdoor activities, such as cycling, snowboarding and snowmobiling, skiing, camping, hiking, mountain climbing, hunting and running. 4. keep warm when cycling and have some actives in the outside.Suitable for winter keep warm only or outdoor Cycling Bike Bicycle Motorcycle etc. 5. Provides SUPPORT to the knees for use in sport activities such as climbing/hiking and even high-impact sports. from those who are highly active in sports to who want support for the knee for walking.