About this item Get ready for a hot summer and wear an ice collar to stay cool. This PCM gel freezes faster and lasts longer than water. (Simply soak it in ice water for 10 minutes or in the refrigerator or air conditioner for 20 minutes!) No batteries required. No charger needed. Anywhere below 64.4°F (64°C) it will begin to freeze. Simply drop the cooling collar tube into the ice water. No ice around you? Don't worry! Using any air conditioner will cause it to freeze! Car air conditioner, office air conditioner, home air conditioner, ice box, refrigerator, freezer. Enjoy 40 minutes to 2 hours of cool time. The waiting time varies depending on the external environment. By maintaining optimal cooling temperatures, there is no risk of skin necrosis or frostbite. 100% brand new refrigerant made in Germany, no condensation! (Dry and cold)! Thermoplastic polyurethane fabric, strong stitching, made in Korea, no tears or rips allowed
