Brand new, unopened, navy *No price reduction Free size (M size) Waist 60-75cm, Length: 30cm *Unisex belly band Material 58% Polyester, 38% Cotton, 4% Polyurethane BS Fine, a new fiber developed by Kamo Fiber in Tsuyama City, Okayama Prefecture, incorporates black silica, and is said to be "wearing a rock bath," providing a comfortable warmth through far infrared rays. BS Fine Waist Warmer differs from conventional belly bands, boasting excellent fabric elasticity and a gentle fit without any uncomfortable feeling. Simply wearing it around your abdomen 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. The inclusion of polyurethane enhances elasticity, reducing tightness and making it comfortable to wear even at night. 【BS Fine】is a new fiber that incorporates natural black silica (Shinten Stone) into polyester using cutting-edge technology. Because 0.3-micron natural ore is 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 increases, successfully drawing out its power efficiently. The "wearing rock bath" BSFINE series warms the body to the core with far infrared rays from black silica, without causing sweatiness, and provides a comfortable warmth.