Double-layer fabric construction prevents friction on the foot, giving a blister-free guarantee. Lightweight and fine Meryl Sport inner fabric effectively transfers moisture to the outer sock, which in turn wicks moisture to the surface of the sock, keeping the foot as dry as possible. The outer fabric has DrRelease Cotton for a superb drying rate, and its durable heel and toe box yarn gives 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 a second skin to prevent friction of the moving shoe. Ergonomic foot-shaped design with sophisticated stitch designs through the toes and heel to reduce seams and irritation on your run.