Safe Soft Gel: CE Approved gel pack is filled with CMC & Glycerin, Non-Toxic and Latex-Free. Safe for all ages: Therapy bag with protective non-woven fabric backing on one side, skin-friendly Multipurpose: The hot and cold pack provides instant pain relief for sprains, vasectomy, strains, fevers, swelling, bites, bumps, puffy eyes, bruises, sports injuries, migraines, sinus pain, laser treatments, dermabrasion, skin care or beauty treatments, minor burns, and more Reusable & Comfortable to Use: The reusable packs come in a pack of 8, the soft gel stays cold in the fridge or freezer (use as a small cold pack anytime). Heats up in hot water or in the microwave. (Pay attention to heating on low heat several times)