suo × f.o International Ice Ring 28°C Brand new, unopened Black, LL size Retail price: 4290 yen (tax included) ☆Instant purchase OK ☆No smokers or pets in the house. Point 1: Naturally freezes below 28°C *1 Point 2: Comfortable because it doesn't condense Point 3: Moderate cooling lasts Point 4: Can be used repeatedly *1 Freezing refers to the state of being solidified. This product uses a special material that solidifies below 28°C, so even if it returns to a liquid state due to the outside temperature, it will solidify again if the product's temperature is cooled to below 28°C, such as by putting it in cold water. Specifically, it maintains a temperature below 28°C for 60-120 minutes in an environment with an outside temperature of 25-40°C.