Instant Cold Pack. Disposable pack provides immediate cold without refrigeration or freezing. A must for emergency situations. Contains urea and water. Helps reduce pain and swelling and is recommended for instant pain relief and swelling reduction immediately after injury. Ideal for: minor bumps, cuts and bruises, muscle aches, strains and sprains, toothaches, headaches, minor burns and insect bites. A must for gym bags, backpacks and travel kits. 16 per pack.