Loose waist warmer. Fluffy knitted knitting is adopted, which has the property of making it difficult for body heat to escape. The part that touches the skin is made of 100% silk (white part), and both sides of the inside are coated with ceramic charcoal from Shizuoka. You can wear it over your underwear and use it as a belly wrap to make it look like a sweater. Washing can be done by hand or in a small laundry net and washed in the washing machine. * Ceramic charcoal is made by coating thinned wood in Japan with clay (minerals) and then carbonizing it at high temperatures. It has functions such as deodorization, humidity control, and far-infrared rays, and is manufactured with the aim of increasing the value and potential of Japan wood.