Designed for diabetes, arthritic pain and cold-sensitive feet, Thermoskin® Slippers are clinically proven to improve blood flow to enhance recovery. They provide light compression to reduce swelling, and they use naturally generated body heat to ease pain and stiffness. Features an exclusive Trioxin 3-dimensional lining that wicks away moisture, rubberized slip-resistant soles, and soft linings with flat seams to protect sensitive feet. Neoprene, nylon and polyester. One Pair. Sizes available in Small (Men's 4 1/2-6, Women's 5 1/2-7), Medium (Men's 6 1/2-9, Women's 7 1/2-10), Large (Men's 9-11 1/2, Women's 10-12 1/2), or XLarge (Men's 12-14, Women's 13-15).