Men's 4PK Medium Cushion Crew Boot Sock Medium Black/Taupe Marble PowerSox 66% wool/32%nylon/2%spandex Keep your feet comfortable and warm this winter season PowerSox stands up for the feet you stand on everyday Four elements of support: Strategic cushioning, moisture management, arch brace, and stretch fit Reinforced toe and heel; arch support -Crew sock Fabric: Cotton/nylon/spandex blend - 2pack Taupe marble 2pack Black