Easy to use as hot spot cold therapy-For cold therapy, just fill two-thirds of ice and water in an ice pack to relieve headaches, bruises, migraines, muscle aches and swelling sense. For heat therapy, add hot water (not boiling) to helpRelieve stomach discomfort, migraine, sinus and joint pain. Bagless ice pack-compression bag will help to fix the ice pack, which is more stable and versatile, and can support the whole body. Safety Waterproof-dacron Textile adopts a leak-proof design to ensure that the water stays cold or hot for longer. And easy to carry and use anywhere. Relieve pain and aches-ice packs are very suitable for cold therapy to relieve pain and swelling caused by minor abrasions, bruises, muscle pain, sprains and strains, suitable for sports injuries and first aid. If you decide to buy, we will be honored. If you have any questions after receiving the goods, please contact us. Please attach your order number, thank you for your understanding. happy shopping