Features: brand new and high quality Special Wormwood Self Heating Knee Braces Warm Knee Pads Sleeves Support. Wormwood Self-heating knee brace for knee pain for women men use, Material: Cotton+Acrylic+Spandex. Highly elastic, skin-friendly, soft, breathable, stretchy, thick, thermal and comfortable to wear all day, keep you knee and leg warm in cold days. Thick thermal knee warmer providing 360 degrees for protection, help keeping your knees and legs warm to relieve pain and prevent rheumatoid arthritis / knee osteoarthritis in the cold condition. Perfect for outdoor sports activities such as Cycling, Biking, Motorcycle, Snowboarding, Skiing, Camping, Hiking, Climbing, Running or as a daily casual wear to keep warm. Nice Christmas gift/Birthday Gift/New Year Gift for your family, friends or treat yourself. Can effectively improve blood circulation, promote metabolism, and clear the meridians,enhance immunity. Package Includes: 1 Pair Self Heating Knee Specifications: Material:Polyester Color:Gray/Black Type:Gray Double Warm L /Gray Double Warm for M/Black Double Warm L /Black Double Warm for M/Gray Single Warm L/Gray Single Warm for M/Black Single Warm L/Black Single Warm for M Size: M:Knee Pad Length:About 46cm/18.11in Leg Circumference:Approx.39-42cm/15.35-16.54in Weight:45-55 KG L:Knee Pad Length:About 46cm/18.11in Leg Circumference:Approx.43-48cm/16.93-18.9in Weight:55-70 KG note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.