Hilly Ultra Marathon Fresh Anti-Odour Running Anklet Socks feature Polygiene Anti-bacterial treatment with breathable quick wicking fabric to remove perspiration. Made from a knitted soft feel nylon (polyamide) blended with Lycra Sports yarn for stretch to give an excellent fit. These socks will keep your feet odour free for all levels of sport and running distances. Especially good for off road Ultra Marathons with high abrasion resistance. The sock features arch grip and venting panels on the upper part of the foot whilst all the pressure points are protected by extra cushioning. There are no inner seams under the toes for comfort.