Super lightweight and designed to prevent blisters and chafing, our Run Socks are just perfect for your hot, sweaty runs. Super lightweight breathable fabric Seamless 3-thread construction with reinforced heel and toe One size fits most (US Men 4-11, US Women 5.5-13, EUR 35.5-45) Option of Low Cut and Mid Cut ankle height Composition: 75% 70D+40D nylon, 25% elastane