High-quality materials: Our ice blocks are made of high-quality polyester, with long service life and wear resistance, and the outside is covered with PVC to prevent leakage. > Suitable Packing: Our ice packs come in 3 sizes, 6", 9", 11", which can fit different body parts, also can be used as a bag hot. Just add hot water and tighten the cap. Easy to use: For cold therapy, just fill an ice pack with two-thirds ice and drizzle. water to relieve headaches, bruises, migraines, muscle aches and swelling. For heat therapy, please add hot water to relieve stomach upset, migraine, sinus and joint pain. Portable ice packs: The compact and comfortable design of the bags allows you to carry the ice pack around your office, car and home for optimal pain relief. Wide Application: Ideal for the application of cold therapy to help with reduce pain and swelling from minor scratches, muscle bruises, sprains and strains, recommended to help relieve pain, reduce swelling and speed up recovery.