Swiftwick Pursuit Seven Socks - Black Large. The new Pursuit is constructed with nature’s technical fiber Merino wool and upgraded with a reinforced heel and toe to maximize durability. The four season fiber of Merino wool provides warmth in the winter and cooling in the summer as well as absorbs moisture without feeling soggy or losing the ability to regulate temperature. The Pursuit is engineered with fine-gauge Merino wool that produces a soft no-itch feel from cuff to toe. The Two cuff height extends beyond the ankle when a low cut is not enough coverage. The Four height sits below the calf and its double-cuff construction provides extra support for cycling and trail running. The Seven is a classic sock height standing at mid calf. Ideal for those looking for a taller cycling sock.