Women's silk underwear | Silk thermal underwear Scoop Neck. Long Sleeve • Silk top & silk pant • Breathable, elastic & warm • High waist • V neck • Pullover • 30% mulberry silk The real silk thermal underwear is made of 30% mulberry silk (spun silk) knitted fabric. The fabric is soft, fits the skin, has good air permeability, keeps warm and not stuffy, can care for dry skin in autumn and winter, and can keep warm and lock water and moisturize. It is very suitable for use as base underwear for autumn clothes and long