With 50% less tendon strain, 25% better air deflection and 33% increased air circulation, X-Socks Sky Run 2.0 Running Socks promise real benefits for all types of runner, from marathon runners to humble joggers, starting right at the top, with self-adjusting cuffs to hold without constriction.X-Socks Sky Run 2.0 Running Socks are especially lightweight and breathable, thanks to the AirGoTex" mesh cuff. The integrated bands of the X-Cross Bandage, and the AirFlow Design Ankle Pads protect the vulnerable ankle region, with comprehensive protective pads placed throughout the socks to fend off impact injury, blisters and chafing.Special AirConditioning channels ensure a constant movement of fresh air, right to the sole of the foot, with warm, damp air being similarly channelled out. Odours and bacteira growth are filtered out by the 99.9% pure silver woven into in the anatomically shaped Sinofit" footbed, which works actively to reduce the risk of developing athlete's foot.