Features: Hot Weather Must have The neck coolers uses innovative liquid plant Phase Change Material to start freezing in environments which freezes faster and lasts longer than water, making it a must-have in hotweather. Perfect Experience: The outer layer is wrapped in Thermoplastic polyurethanes, so there is no need to worry about frostbite on the skin. The integrated molding does not require stitching, so there is no need to worry about damage or leakage. reusables: Neck coolers is made of Phase Change Material and can be refrozen after each use, allowing for multiple uses. Simply put the neck coolers in the refrigerator or freezer until solidifies and enjoy it. Ergonomic Design: The neck coolers is designed to fit the curvature of the neck providing a comfortable and safe fit . Light in weight and Convenient light in weight, and easy to carry, making it an ideal companion for any occasion. Specifications: Material: PVC Color:Blue,Pink,Green Package Includes: 1Piece Neck Cooling Tube note: Please allow 1-2cm errors due to manual measurement. Due to the differences betweeen different monitors,the picture may not reflect the actual color of the item.