Silk Hemp & Linen Soft Toe SocksThe inner layer is silk, and the outer is linen (natural color uses hemp). Linen is breathable and cool, offering a fresh, airy feel. The natural version blends wild silk and hemp, which may help with odor control. Silk wrapped polyurethane threads are used on the inside, so only silk touches your skin. With minimal synthetics, these socks are softer and more breathable, though slightly more delicate. 22cm 25cmApprox. US Women's 58 Men's 47 68% Plant