Soft Comfort CorPaks™ help to ease pain and reduce inflammation associated with strains and sprains. Accommodating both hot and cold therapy, the non-toxic, completely natural fill allows the pack to remain pliable, comfortably contouring to your pain points. Use cold to reduce inflammation, hot to relax muscles and promote healing. Soft, frost-free design is gentle on skin—no wrap needed. Each pack, when properly prepared, maintains its therapeutic temperature for up to 20 minutes. Keep one ready for use, stored in your freezer, or quickly heat one up in your microwave. Latex-free.