SIZE:M: Outer length - 55cm, suitable for leg circumference - 35-42cm, suitable for weight - 35 to 50kg.L: Outer length - 55cm, suitable for leg circumference - 40-50cm, suitable for weight - 50-70kg.XL: Outer length - 55cm, suitable for leg circumference - 40-50cm, suitable for weight - 70 to 90kg. [Humanized Design]Our product is of elastic design so that you can wear and take them off easily, bending freely. The double thickened design of fleece provides gentle supports for weak or injured knees. Besides, it is lightweight and comfortable that will help blood circulation and doesn't exert compression to your legs. [Comfortable Material]Our knee joint brace support pads are made of high-quality cotton which is skin-friendly, washable and breathable. The soft and durable cashmere provides necessary heat retention to keep your knees warm in the cold weather and you can use it for a long period. [Wide Application]Our knee warmers have a effect on a variety of sports protection, particularly in winter for elderly who suffers from osteoarthritis, arthritis or joint pain. It is also perfect for outdoor activities such as volleyball, baseball, rugby, skiing, cycling, ice skating, dance, yoga, gym, training exercises, morning exercises, etc. [Warm-hearted Present] Our wool warm thermal leg compression sleeve is a warm-hearted present for your parents in the freezing winter, warming not only their leg but also their heart. They will be moved by our product delivering your love.