There soft, cosy Hot Sox are the perfect way to soothe your tired or chilled feet. They may help to improve your circulation and ease arthritic pain. Hot Sox are a natural product made from 100% cotton and are breathable. Just heat the Hot Sox in a microwave to enjoy the warmth and comfort while it slowly releases its natural power and aroma of pure essential oils. One size fits most feet. Key Features Wheat the internal thermal cushion contains wheat (so may not be suitable for people with a serious wheat allergy). Heating heated in just 1 or 1 and a half minutes dependent on the power of your microwave. Place a cup of water in with the hottie to help the heating process. Top-Up eventually the essential oils will need to be replenished, just add a few drops of oil to the wheat cushion after heating. Size fits size 11 and under. Dimensions and Weight refer to packaged product Dimensions (mm) 280(h) x 240(w) x 40(d) Weight 930 g