Cool and refreshing with special materials! Enjoy a comfortable coolness with the COOLOOP Neck Ring Set of 2, Shop Channel. Includes a round ice pack storage case. L size, Cogit. Uses PCM, a material researched and developed to protect astronauts from rapid temperature changes in space. It solidifies and cools in environments below 28°C, and absorbs heat and melts in environments above 28°C, repeatedly controlling the temperature to maintain approximately 28-29°C. Unlike ice packs, it doesn't necessarily need to be frozen. Because it doesn't get too cold, you can repeatedly enjoy a comfortable coolness. The set includes two neck rings and a storage case, so you can put the frozen ice pack and neck ring in the storage case and carry them around, allowing for long-term, repeated use. Approximate freezing times: ・Natural freezing (below 28°C): 4 hours 30 minutes ・Cold water: 40 minutes ・Refrigerator: 45 minutes ・Freezer: 20 minutes ※Varies depending on the environment Shop Channel This product was 6560 yen when broadcast on SHOP CHANNEL.