Thank you for viewing! This is a comfortable, soft-material belly band. ◾︎Size: L ◾︎Material: 58% polyester, 40% nylon, 2% polyurethane ◾︎Brand: BSFINE ◾︎Color: Navy I bought two, thinking I'd need a spare, but they dry quickly after washing, so I never used the second one. Both were pre-washed before wearing, so I hope you understand. There are some slight fold marks, but I don't think I even tried them on, so they shouldn't be stretched out. I'm selling them cheaper than the retail price, so if you're interested, please give them a try!(^^) BS Waist Warmer Black M Purchased new from the official online store and worn only once. The inner tag was cut off immediately after purchase. Material: 58% polyester, 38% cotton, 4% polyurethane Unisex belly band Quoted from the official website: ◾︎Developed by Kamo Fiber of Tsuyama City, Okayama Prefecture, the new fiber "BS Fine" incorporates black silica and is said to be a "wearable bedrock bath," providing a comfortable warmth through far-infrared rays. Unlike conventional belly bands, the fabric has excellent elasticity and fits the body gently without feeling restrictive. Just wearing it around your stomach warms your body from the inside. It's thin, so it won't show under your outerwear. The "single-bag border fabric" used is a belly band-exclusive fabric with a two-layer structure of BS Fine, cotton, and polyurethane. Polyurethane is added to increase elasticity, reducing the feeling of tightness, making it comfortable to wear at night. ◾︎It is a new fiber that incorporates natural mineral black silica (Shinten Stone) into polyester using cutting-edge technology. Because 0.3-micron natural minerals are enclosed in the center (core-sheath structure) of 3-micron polyester fibers, the effect does not change at all even after washing. Furthermore, by making it finer, the surface area of black silica is increased, and we have succeeded in efficiently drawing out its power. The "wearable bedrock bath" BSFINE series warms the body from the core with far-infrared rays from black silica, so you won't sweat and can experience a comfortable warmth.