Constructed with a soft bamboo-charcoal blend, the bamboo knee supports are temperature regulating, retaining therapeutic warmth when you are cold and releasing excess heat when you are not, so your knee stays comfortable and dry. The material also contains fibers to reduce buildup and unpleasant odors. The soft blend is non-irritating to the skin for a comfortable fit throughout the day. The knee supports are exceptionally durable, withstanding frequent machine washing without pilling or fraying.