When the workout gets tough, these socks can keep up. The Contrail, from HOOey, are high-performing mid-calf socks built for fashion and function. Yellow HOOey accents - including their signature cowboy - balance well with the white, dark grey, and black color-blocking of this style. Key components include arch support to fight foot fatigue, heel cushioning, moisture management system, and rib ankle. Size medium - Men's - 4-8.5 and Women's 7-10.5Size large - Men's 9-12.5 and Women's 11-13.