Even though you can layer multiple socks at home, it's not always easy to do so when you're out for work or other activities. That's where our 'Inner Silk Outer Cotton' cold protection socks come in handy.[Inner Silk Outer Cotton]The inner side, which touches your skin, is made of 100% silk, while the outer side is crafted from 100% cotton. This design provides the effect of wearing two pairs of socks - silk followed by cotton - all in one pair.[Comfortable Fit for Any Occasion]These socks offer just the right fit and size, making them comfortable to wear on any outing. They feature a unique three-layer knitting structure, with 100% silk on the inside, 100% cotton on the outside, and stretchy yarn in the middle to prevent them from clinging to your skin.[No Tightness! Loose Elastic Cuff]The cuff is designed without any tightness, ensuring a simple and relaxed fit.[Please Note]When washing, please use a laundry net.Do not tumble dry.Due to the nature of silk, these socks may be more delicate and prone to tearing compared to regular socks.