Half price!! This is a water-cooled vest, used only three times after purchase. I bought it for 20,000 yen. - SPMLFL Cool Vest with a cooling effect of -20℃, equipped with a 10000mAh battery and a usage area of 288CM². - Color: Black - Function: Cooling function - Model name: SPMLFL - Cooling effect: -20℃ - Battery capacity: 10000mAh - Usage area: 288CM² Thank you for looking.