The 1000 Mile Fusion Anklet Sock combines comfort and protection with the 1000 Mile Double Layer System for reduced friction and blister protection. This sock features an extended padded zone around the ankle for Achilles tendon protection, and reshaped padding on the toe and ball of foot areas for enhanced comfort. New ventilation zones on the top of the foot increase breathability to help keep feet cool during wear. This sock is knitted to an ankle length for those who prefer a shorter sock. Features: NEW Ventilation zones for added breathability, Padded Achilles tendon protection, Arch bracing for additional support and custom fit, Padded comfort.