Swiftwick - PURSUIT FOUR, Quarter-Crew Socks for Snowsports and Trail Running MADE IN THE USA: Swiftwick socks are made in the USA, an important commitment we make to our customers and local communities. Purchase includes one pair of socks. NATURAL MERINO WOOL: Made of soft, natural merino wool that wicks moisture to keep you dry and comfortable year-round. Material composition is 67% merino wool, 29% nylon and 4% spandex. CHANNELED UPPERS: Channels release heat and moisture to improve breathability. FLEX ZONE: Half-density weave prevents bunching at flex points. Y-HEEL CONTOUR AND SEAMLESS TOE: Y-shape stitch creates a contoured heel pocket that moves with the foot. Virtually invisible toe seam eliminates friction in the toebox.