The "Bella's Hot/Cold Pain Relief Pack" is a safe, reusable, totally non-toxic hot/cold pack used to provide pain relief for the canine market. It has a glycerin gel based, removable inner bag and a soft blue outer fabric bag with the Bella logo on it. The inner gel bag is non-toxic and leak proof, should your pet puncture the gel bag. The pack may be stored in the freezer for cold applications or placed in the microwave for heat applications. The Bella Pack is very easy to use and comfortably fits most medium to large dogs. Uses/Applications: Pain relief from canine arthritis, hip dysplasia, joint & muscle pain. Speeds postoperative recovery for any surgical or orthopedic procedures. Helps to heal muscle sprains & strains, especially for competitive agility dogs. Keeps your pets bed or pet carrier warm/cool.