DESIGNED FOR COMFORT Swiftwick MAXUS™ are ideal if you desire cushioned running socks without compromising fit and performance. MAXUS™ delivers compression performance benefits you can feel in a relaxed comfortable fit. The plush footbed is constructed using high volume fibers that wick moisture 40% better than competitive materials with a thin Olefin upper to increase breathability. One cuff height rises just above the ankle for additional support and protection. Maximum CushionRelaxed CompressionBreathable Upper 64% Polyester / 24% Nylon / 10% Olefin / 2% Spandex Swiftwick sizing is based on your corresponding shoe size. Please refer to the size chart below: