I used this to keep warm during my pregnancy. It was very comfortable even in the later stages and kept me very warm. Even after using it in the later stages of pregnancy, it hasn't stretched out, and I can still use it. [Product Details] *Warming your belly to build a healthy body and prevent illness* Silk, known as the "queen of fibers," is a versatile natural fiber composed of the same amino acids as skin. It has excellent heat retention, high moisture absorption and release, and is breathable, making it clean and comfortable. You can wear it throughout the year. Unisex and can be used by pregnant women♪ Product Name / Silk Belly Band with Mellow Finish Material / 100% Silk (Separate rubber thread used: Nylon, Polyurethane) Size / Free Size (Fits those with a waist circumference of 55-100cm) (The fabric is knitted loosely to provide a soft touch. Therefore, there may be an error of approximately ±3cm. Please understand.) This is a set of 2.