Our Microwaveable Buckwheat Heat Therapy Mitts Help relieve pain and stiffness. Recommended for those with Arthritis, stiff joints or hard working hands. If you are suffering from stiff hands, poor circulation, Arthritis, or hand pain from overuse, get relief using Buckwheat Therapy Mitts. Made of super soft, blue fleece, Buckwheat Therapy Mitts provide maximum warmth and comfort simply by being microwaved for 30-40 seconds for convenient and instant pain relief. Heat therapy helps improve poor circulation. Made with fleece to provide warmth and comfort. One size fits all.