Darn Tough Men's RFL Over-The-Calf Ultra-Light Sock in Black SIZE:L The soft collar and Sensiflex

The soft collar and Sensiflex technology snuggly adapt to the foot

Large ventilation channels which ensures extreme ventilation

the Gravdal securely navigates through harsh winter conditions with concave carbide studs far added traction in icy conditions

developed specifically for Apidura

Darn Tough Men's RFL Over-The-Calf Ultra-Light Sock in Black SIZE:L The soft collar and SensiflexThe Darn Tough RFL Sock brings together a smooth Merino Wool feel, next to skin fit, flex and fatigue zapping arch support, and targeted venting the ultra lightweight RFL is the sock experience your hard charging feet have been dying for, lap after lap. Materials: 55% Nylon 42% Merino Wool 3% Lycra Spandex