Designed for running or biking activities where a lightweight, breathable sockis needed. Made with CoolFusion technology that maximizes the benefits ofnatural and synthetic fibres to deliver a highly ventilated sock whileensuring it is light and comfortable. Added cushioning in the heel, ball, andtoes for impact protection. The CoolFusion Multisport features targetedcooling ventilation exactly where needed throughout the foot. Knit with MerinoWool that provides warmth when needed and excellent moisture wickingproperties. ENDUROFIL adds additonal durability and wash resistance. Ankleheight and light cushioning in key areas for added protection.