Maxit 102322809 M-Soxx Thermal Sock, 20" Length x 4-1/4" Width x 1/8" Height, Black (1 Pair) Over the calf, tube style sock Originally developed for and worn by the players of the NFL Sewn with comfortable, durable, flat-lock stitching Provides maximum protection against cold and wind with unsurpassed moisture management properties Wear alone or use as effective thermal liners with any style socks