Premiun Quality Material: Our cooling neck coolers is made of phase change material, freezing in environments below 18 ° C (64 ° F), which freezes faster and lasts longer than water, making it a must-have in hot summer. 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. Reusable: Simply place the Ice Coolers in the refrigerator or freezer for 20-30 minutes and enjoy a cool down. After use, put it back into the refrigerator to store for next time use. Use more than one collar for better results. Ergonomic Design: The neck coolers is designed to fit the curve of the neck, providing a comfortable and secure fit while keeping you cool. Easy to Carry: This neck cooler is small, lightweight and comes with a cooler bag for easy transportation. It is a good helper to relax your neck when traveling and at home. NECK COOLERS