Use as a hot pack for body aches, stiff joints, cramps, sore muscles, arthritic pain and swellingUse as a cold pack for strains, bumps and bruises, headaches, insect bites and toothachesPromotes safe, natural relief of muscle aches, arthritic pain and swellingThe Reusable MultiPurpose HotCold Pack is more convenient than the traditional ice bag or electric heating pad. It helps in relieving pain and healing of common aches and injuries. Keep one handy to use again and again whenever you need fast pain relief for muscles or jointsApprox.