Aspire Four Medium Yellow THIN, BREATHABLE SUPPORT Our most popular cycling sock. The ASPIRE™ is engineered with firm compression and a thin profile for a responsive feel. Firm compression supports every contour of the foot to reduce fatigue during endurance activities. The Four height sits below the calf and its double-cuff construction provides extra support for cycling and trail running. Thin profile with light cushion Channeled upper improves breathability Lightweight Olefin fiber wicks moisture and dries quickly 67% Nylon / 28% Olefin / 5% Spandex One Pair