The bottom crotch is made of precious mulberry silk, which is cool and breathable, feels silky and smooth, and does not irritate the skin. Mulberry silk is a natural protein fiber that is not contaminated during the process of planting, sericulture, and silk weaving. It has excellent biocompatibility with the human body and is known as the "second layer of skin". It has excellent moisturizing and breathable properties, earning the reputation of "fiber queen". Its water absorption is 1.5 times that of pure cotton and 1.8 times that of wool, which can maintain skin moisture balance. Mulberry silk is not easy to come by, destined to be luxurious and mysterious.