* Features a plush multi-ply cover designed to focus heat toward the body andprovide a snug secure fit * This ?unplugged? version of moist heat therapy offers the maximum inportability and convenience * The patented non-allergenic crystal fill does not leak smell or encourage the growth of fungus and the porous surface traps up to 40% of it's weight in atmospheric moisture for reliable moist heat therapy * Natural moist heat works in three ways: - Blocks pain signals to your brain - Relaxes muscle tissue to relieve cramps or spasms - Increase circulation to enhance the healing power of your own body * Outer multi-ply fabric includes a vapor barrier to direct maximum moist heat where you need it most * Wide elastic and velcro strap holds the heat therapy snug and secure against your skin with gentle compression * Holds pack in place while you continue regular activities * More economical than disposable single-use heat packs