The Pearl Izumi Transfer Air 7" Socks are constructed with an ultra-lightweight Transfer fabric made with an olefin blend that works quickly to move moisture away from your skin to speed evaporation. Their 360-degree tension band around the arch provides a secure, smooth fit that is ideal for close fitting cycling shoes. It features a standard 7 cuff with venting on the top of the foot for enhanced breathability and a reinforced heel and toe for durability.