The thick cushion Thorlos Unisex SKX Ski Socks are designed to provide a comfort fit for skiers on easy to varied terrain who wear rental boots to ensure maximum warmth, protection, comfort and best fit. Featuring Exclusive THOR•LON® and THOR•WICK® blend for maximum WICKING because a dry foot is a warm foot, Thick cushioning in ball and heel for WARMTH, SHEAR PROTECTION and COMFORT, Thick cushioning in shin and instep PROTECTS AGAINST SHIN BITE, Moderate cushioning in the arch for BETTER FIT (Spandex for support), and finally Ventilation panel for BETTER AIR CIRCULATION.