Cool vest with instant cooling function using circulating water cooling technology. - Cooling function: Lowers perceived temperature by 20°C - Circulating water cooling technology: Uses a charge bottle and pump - Instant cooling: Rapid cooling in 2 seconds - Usage time: Can be used continuously for up to 74 hours - Temperature adjustment: Lowers temperature from 38°C to 22°C during use Thank you for viewing. This is a new, unused item. It is a size L. This product is sold for 9980 yen in online shops. The shipping label will be attached directly to the original cardboard box. Thank you.