Cold Weather Running Crew Color:Black/Dark Gray The Work Boot sock is

The Work Boot sock is designed for use in cold to hot conditions

66% Copper Polyester

have classified fluoropolymers like PTFE as "polymers of low concern" because their properties make them low-risk to human health and the environment

and more comfortable

9% Elastane

Cold Weather Running Crew Color:Black/Dark Gray The Work Boot sock isWhen outside is cold, windy, and snowy, special socks are needed to get through your run. Cold Weather Running Over the Calf Socks are the best possible pair of winter running socks. In cold or freezing temperatures, moisture is the skins worst enemy. Moisture pulls heat away from the skin 23 times faster than air. This can reduce skin temperature so rapidly that wet feet feel painfully cold. Wet skin makes the feet much more susceptible to frostbite