Featured Size - 9" Ice Pack, Hot and Cold Reusable Hot and Cold Pack, the right size for quick pain relief, suitable for all bodies.Safe, reusable and portable - non-toxic. Cold or hot water can be used multiple times. The product weighs 3.6 once, and it is small and portable, so you can take it with you wherever you go to prevent accidental sprains or pain.LEAK PROOF - Excellent leak proof cover and waterproof design. Note: There is solidified water on the outside of the ice pack, this is a normal physical phenomenon, not the ice pack leaking water.Use as a Cold Pack - Easily add ice cubes and a little water to make a beautiful ice pack for you. By restricting blood flow, ice packs can reduce swelling, reduce muscle spasms, and relieve pain quickly and significantly. Cold therapy can be used for sprains, fever, toothache, headache, bruises, bruises and other sports injuriesUse as a heat pack - For heat therapy, simply add some hot water (not higher than 80C) to improve menstrual pain, breastfeeding pain, headache/migraine, fibromyalgia, cramps, cramps, bursitis and stiffness, etc. Symptoms neck/back.