Schiller America Spirometer Mouthpiece, 1 Box of 10 Calf Sleeve Versatile: Wrist thumb orthosis ideal for Style:1 Pair (Left & Right) Versatile: Wrist thumb orthosis ideal for wrist sprains and strains Good2Go Large 12 x 16 * Plush multi ply cover design focuses moist heat right where you need it most * Joint specific or multi use shapes for a snug secure fit * Portability convenience and economy in a reusable unit that will last for years * Patented non allergenic fill does not leak smell decay or encourage fungus growth * Fill has a special porous surface to trap the maximum amount of atmospheric moisture * Wide elastic strap holds heat snugly in place while you continue regular activities * Mitt is filled with two soft gel packs that can be heated or frozen as needed to surround your hand with either hot or cold therapy For use with: SP 150 or SP 250 Spirometer