100% brand new and high quality Features: Size,length 80cm/31.50inches, please measure the leg circumference above the knee before buy. self warming, this knee brace built-in self-heat magnets, it would be warm up itself( the exact time varies from person to person). Help to improve the blood circulation, clear the meridians, relieve physical local fatigue and pain, anti-inflammatory and analgesic, swelling,suitable for people who suffer from body chills and arthritis. High elastic belt, elastic good, wearing comfortable, soft self-adhesive pad that easy to put on and off. adjustable hook and loop fasteners straps to made this knee sleeve fit different size, perfect for women and men. Good choice for pain relief, osteoarthritis in the knee, sports injuries, bruises, edema and rheumatic diseases. Wonderful gift ,it can be a sweet wonderful gift for your friend , family , parents, or yourself ,it is suitable for outdoor cycling,or indoor. Specifications: Material:Mercerized Cotton,Heating Sheet,Magnet,Hook and Loop Fasteners Size:80X23cm/31.50X9.06inches Note: Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Includes: 1 Pair Tourmaline Knee Support Brace