The ultimate anti-blister double layer sock. Minimises friction on your foot to keep your feet comfortable. The fine inner sock is made from Meryl Sport that draws moisture away from the foot and transfers it to the outer sock. The dri-release outer layer is great at drying to leave your feet feeling dry and comfortable. This double-layer construction prevents friction from occurring on your feet and blisters from appearing. The durable heel and toe sections help you put the miles in, making Twin Skin a trusted partner of many runners. The LYCRA SPORT fibre ensures a close, comfortable fit. Socks designed and manufactured by HILLY, the UK's premier technical performance sock company for runners - founded by Ron Hill. Features: Double-layer construction to prevent friction on the foot. Lightweight and fine Meryl Sport inner effectively transfers moisture to the outer. DriRelease cotton outer layer ensures superb drying rate. Durable heel & toe box yarns. Vented upper and outer. Inner sock arch grip. Technical Details: Minimum Cushioning. For runners that like a small amount of cushioning, especially in the toe and heel areas for an added touch of comfort. Minimum is the second level of cushioning from HILLY, above Zero Cushioning level. 100% Satisfaction Guarantee. Hilly knit all their socks with great care and to the highest standards. If you should have any issue with your HILLY socks please speak to the retailer you purchased them from and alongside ourselves we will replace your pair with new. Fibre Composition: 58% Polyamide (Nylon), 19% Polyamide (Meryl Sport), 15% Polyester, 4% Cotton, 4% Elastane (LYCRA Sport).