3 SIZE DESIGN FOR DIFFERENT REQUIREMENTS Small 6 and medium 9 soft and reusable ice bag for children and teens, large 11 ice pack for adult. Our reusable ice bag for injuries is a must-have product for sport injuries, pain relief, muscle aches and first-aid etc. EASY TO USE AS HOT & COLD THERAPY For cold therapy, simply fill the ice pack two third full with ice and water to relieve discomfort from headaches, bruises, migraines, muscle aches and swelling. For heat therapy, add hot water (not boiling, Notice: The temperature for hot water therapy is 50-60/122-140.) to help soothe an upset stomach, migraine, sinus and joint pain. INSTANT PAIN RELIEF - The reusable ice bag are ideal for application of cold therapy to help reduce pain and swelling from minor scrapes, bruises, muscle aches, sprains and strains; Suitable for sport injury and first aid. Recommended to help relieve pain, reduce swelling, and speed recovery.