Luxurious Grenasa Silk loungewear set in a sleek gray color. Perfect for comfort and style. Grenasasilk Womens Silk Long Underwear Mulberry-silk loungewear, pajamas or base layer NATURAL SILK: Silk long underwear for women is made of pure murberry silk knit fabric,ultra soft,lightweigh and smoothly, good breathability and moisturizing. -Silk protein is one of the best underwear materials,this women's long johns is very friendly to your skin,silk is the most hypoallergenic of all fabrics,anti-static properties,the perfect choice for sensitive or allergy-prone skin, take care of your body. (Top & Bottom) the elasticity of knitted fabrics will be integrated with you, just like your second skin, and make you feel free and comfortable. Can be be worn as an extra silk base layer of warmth under your clothes in cold weather, or as a thermal long underwear for sleep. -Please use neutral detergent,washes well in machine on gentle or hand wash in normal temperature water ,then air dry.do not use bleach.