PACK, COLD/HOT 4"X10" (2BG/BX) For fast pain relief at home. A soft, gel-filled pillow that chills in your freezer to an ice-cold temperature. A convenient way to apply cold first aid. Use for: minor bumps, bruises, muscle aches, strains, sprains, tension headaches, minor burns, scrapes, cuts and insect bites. Gel-filled pillow can be used on any part of body.