Swede-O Thermal Supports have a micro ventilated breathable membrane that provides a free flow of air, allowing the skin to remain well ventilated and comfortable. The soft thermal lining captures and reatins your natural body heat for effective pain relief and therapy. With unsurpassed quality this thermal support provides comfortable compression and warmth to help reduce swelling and associated pain to promote recovery.- Arthritic Glove, X-Large, Black (093136)