BREATHABLE DESIGN - Featuring upper channels that provide ventilation for increased breathability, preventing hotspots and keeping your feet cool. CONTROLLED SUPPORT - Moderate compression throughout the arch band gently hugs your feet to support your muscles and keep your socks in place. REINFORCED HEEL AND TOE - For maximum durability in abrasion prone areas, we?ve reinforced the heel and toe. Go ahead, test its limits. MADE IN THE USA: Swiftwick Socks are designed and crafted in the USA International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.