You'll love this comfortable fitting sock from SockGuy. It says "13.1" and features a multi-stripe design and a colored heel and toe.

• Features the Channel Air Formula which incorporates SockGuy's exclusive Cool Comfort Formula plus lightweight features that make SockGuy's Channel Air the perfect running sock
• Airflow mesh provides four channels of cool air mesh ventilation
• Terry padding adds five channels of plush terry padding for extra cushion
• Arch support provides stay-put support for increased comfort and eases fatigue
• Seamless toe design prevents irritation and friction at the most vulnerable areas
• 2" cuff