The Relief Pak Point Relief Hot Cold Spot Cold or Hot Therapy Pack has a comfortable soft fabric that conforms to the curves of your skin. The fabric is gentle on the skin frost-free and washable. Put the pack in the microwave or chill in the freezer. When heated it soothes discomfort from stiff neck backache arthritis sprains and bruises. When chilled it soothes discomfort from injury sprains and strains muscle soreness bruises swelling and tension headaches.