OutCool U-Flex Cooling Pack is a neck ice pack, made of PVC material, can be filled with ice or water. This bendable ice pack is soft and flexible. With 5.5cm water injection port, the recessed lid design makes it easy to twist. Available in 5 different colors to choose. The blue ice bag is most popular among them. The neck cooling pack is suitable for hot weather after exercise and long-term outdoor work, etc.