X Bionic Run Performance Socks. Comfortably light & soft, X-Socks Run Performance are also efficient energy boosters for your feet. All anatomically vulnerable zones are padded, reducing the chances of blisters & pressure sores even during long periods of intense activity. The aerative abilities of the specially designed materials & the knit-mesh technology in the ventilation zones ensure that the foot, constantly supplied with air, is naturally cooled, & an ideal temperature is maintained. Heat & moisture are not trapped in the sock but are pumped out of the shoe by the current of circulating air. Your feet stay dry & that way remain uninjured even after the toughest workout. Pull-on Non-Slip Flap – secures short socks to the shoe Self-adjusting Cuff – adapts to any size leg without slipping or constricting. Air Conditioning Channel – ventilates & dries Instep Protector – distributes pressure Stretching Rib – for optimised fit Toe Protector – warms, cushions & protects Air Cool Stripes – cooling channels Anatomically shaped footbed – for a precise fit Achilles’ Tendon Protector – reduces the incidence of pressure points & the risk of scraping & bruising X-Cross Bandage – cushions & stabilises the sensitive ankle area without restricting freedom of movement Air Flow Ankle Pads – encourages active air exchange Heel Protector – reduces friction & the risk of blistering Traverse Air Flow Channel System – lateral ventilation under the sole