The Sockwell At Ease Black men's sock features Accu-fit technology. This non-binding, diabetic friendly sock features a relaxed fit true rib leg and seamles toe construction. The light cushion sole provides comfort and has a non-abrasive seamless toe closure. It embraces spandex throughout the sock. It includes 42% merino wool, 42% bamboo rayon, 14% stretch nylon and 2% spandex. Size medium/large fits mens 7 to 10 while the size large/XL fits mens 10½ to 13.