This is a diving inner garment, the Hot Capsule. The special airtight brushed processing prevents warm air from escaping, providing excellent heat retention and heat storage. It also has antibacterial and deodorant properties, controlling unpleasant stuffiness and the growth of E. coli and other bacteria. It's very useful as an inner layer under a wetsuit for diving in Okinawa in the spring or during the domestic diving season!! This is a black, short-sleeved design, 2-way tricot jersey diving innerwear. Originally priced at ¥12,100, it's being offered for sale at ¥4,780. Shipping is included, making it a great deal. Available sizes are men's S only, and women's S, M, and L. Thank you for your interest!!