Double-layer fabric construction prevent friction on the foot, giving a blister free guarantee Lightweight and fine inner fabric effectively transfers moisture to the outer sock which in turn wicks moisture to the suface of the sock, keep the foot as dry as possible The outer fabric has Dry Release Cotton for a suberb drying rate, and its durable heel and toe box yarn to give greater support and toughness in the pressure areas for a longer lasting sock Inner sock arch grip for support, and a great fit that acts as asecond skin to prevent friction of the moving shoe Ergonomic foot shaped design with sophisticated stich designs throgh the toes and heel to reduce seems and irritate you on your run