Therm-o-clay natural clay compress is a quick and effective solution that will help with pain relief. Reduces muscle aches and pain, spasms, joint stiffness, migraines, sprains, inflammation, bruising and much more. Retains temperature for up to 2 hours, providing 300% longer lasting hot and cold therapy than compresses made from Oats or grains and is more effective than a traditional Gel pack. Simply heat the therm-o-clay compress in the microwave for a soothing heat therapy or place in the freezer for an ice-cold therapy. Manufactured with a unique technology and design, The therm-o-clay hot or cold pack is latex-free, reusable and non-toxic. This all-natural wrap compress will help relieve your pain so you can continue your daily activities. Includes a free A removable, machine washable cover, which is a perfect fit for sports and multiple other uses. Model # 740-840.