Hot & Cold Packs for Aches, Pains and MoreGet relief from strains, sprains, tendonitis and other injuries with the Dual Comfort Therapy Pack. The unique strapping system securely fastens anywhere on the hot and cold packs. The non-toxic gel is biodegradable and retains therapeutic temperatures longer. Soft, plush "frost-free" cover protects your skin. Store in the freezer; stays soft and pliable. Heat in the microwave.Heating instructions - Based on initial pack temperature below 75F (24C)Knead after each heating. Microwave ovens vary; use care when heating and removing pack from microwave. Overheating pack may cause pack to rupture and/or leak. Carefully check the pack with the palm of your hand before applying. Discard pack if punctured or broken.Heat 30 seconds on high heat, knead and then continue heating at 10-second intervals until desired temperature is reached.Core-532