Product Name:Silk underwear Content: 100% silk Weight:180GSM silk is natural anti-statics,flame-retartant and anti-bacterial and so on,Too much advantages to make the apparel more lighter,softer,smooth etc.Silk is natural moisture controller.It can fit the best for your skin,adjust to the temperature changing,Also natural material is envirenmental,and it will decrease the damage of burning accidents. Hand wash only.