[Features] ●Underwear (underwear) made in Japan with extremely high heat retention and cold protection, pursuing ultimate warmth and stress-free comfort. The fabric itself has high moisture retention due to the unique combination of knitting method, yarn selection, and dyeing method that traps warm air. ● By knitting and dyeing for each size, we maximize the stretch and fit that the knit fabric originally has. ●By using a machine made by Lamperti in Italy, the fabric is finely textured and densely brushed, which not only makes it easy to store warm air, but also achieves a very pleasant texture. ● By sewing with a special sewing machine called a flat seamer, the seams do not bulge and reduce contact with the skin.