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. Merino Wool is a naturally renewable resource and is sustainably sourced. The Four height sits below the calf and its double-cuff construction provides extra support for cycling and trail running. Improved durability with high tenacity fibers in abrasion prone areas Versatile mid-cushion option delivers lasting comfort and performance Soft, natural Merino Wool 63% Merino Wool / 35% Nylon / 2% Spandex