Knitted fabric with ultra-fast-drying ArmourDry technology keeps feet light, dry and cool.ArmourDry technology helps disperse moisture and allows sweat to evaporate quickly.Breathable mesh ventilation zones on the top and bottom of the foot, exactly where it's needed most.Ultra-thin and lightweight design for a barely present feel.The new Locked-In Fit construction keeps the sock securely attached to the heel.Arch support helps reduce foot fatigue.A conformed heel hugs your foot for a better fit.Seamless toe for more comfort and less irritation.Reflective logo for running in low light.2 pairs of socks.