Ice pack inner layer made of durable PVC, prevent ice melting to seepage water. Outer layer made of polyester, durable and can be used repeatedly. Large cap opening for easy filling of ice cubes or crushed ice. Leak resistant cap with rubber sealed loop and thread design is good sealing and strong leak proof. Medium spec 9 inches for different body parts of children, teens and adults. Same application range with 6 inches ice pack, must have product for sport injuries, pain relief, muscle aches and first aid etc. Fill ice bag with two thirds of ice and water to relieve headaches, bruises, migraines, muscle aches and swelling. Price includes one color one location imprint and shipping cost to USA. Orders of 100 pieces or greater are eligible for sea shipping. 100% guarantee for quality.