The ultimate anti-blister double layer sock, designed to minimize friction and keep your feet comfortable. The fine inner sock is made from Meryl® to effectively draw moisture away from the foot and transfer it to the outer sock. The dri-release® outer layer boasts a superb drying rate, leaving your feet feeling dry and comfortable. This innovative double-layer construction prevents friction and the appearance of blisters. Durable heel and toe sections are built to withstand long distances, making Twin Skin® a trusted companion for many runners. The LYCRA® SPORT fiber ensures a snug and comfortable fit. Available in various colors and anklet lengths. These socks are designed and manufactured by HILLY, the UK's premier technical performance sock company for runners, founded by Ron Hill. Key features include a double-layer construction to prevent friction, a lightweight and fine Meryl® Sport inner for efficient moisture transfer, a DriRelease® cotton outer layer for rapid drying, durable heel & toe box yarns, a vented upper and outer, and inner sock arch grip. The cushioning level is minimum, providing a small amount of cushioning, especially in the toe and heel areas for added comfort. Minimum is the second level of cushioning from HILLY, above Zero Cushioning. Hilly offers a 100% Satisfaction Guarantee; if you encounter any issues with your Hilly socks, please contact the retailer or Hilly directly for a replacement. Fibre Composition: 58% Polyamide (Nylon), 19% Polyamide (Meryl® Sport), 15% Polyester, 4% Cotton, 4% Elastane (LYCRA® Sport).