Soft Comfort CorPaks™ are the perfect solution to help relieve strains, sprains, headaches and other soft tissue injuries. These versatile packs can be cooled in the freezer for acute care to help control swelling and blood flow, or warmed in the microwave to aid muscle relaxation, encouraging increased blood flow to promote healing. The Soft Comfort CorPaks™ frost free exterior is made of a proprietary blend of synthetic fibers and organic plant materials. It is gentle on skin and does not need to be wrapped in a towel. Soft Comfort CorPaks™ have more fill than traditional packs to retain cold and heat longer. Long-lasting, reusable and filled with nontoxic, biodegradable fill. Customized packs can be used as promotional giveaways for customers (call for details) or can be sold as the perfect hot and cold pack. **Note** For cold use, freeze for 1 hour minimum before use or store in the freezer for convenience. For warm use, heat in microwave for 30 seconds on high, then at 10 second intervals until desired temperature is reached. Knead after each heating. Special heating instruction for the 3x5 packs. Heat 15 seconds on high heat, knead, and then continue heating at 5 second intervals until desired temperature is reached. Knead after each heating.