A classic solid color thin black sock wool . It has rib which makes it just right tight to the leg , and an elastic which makes it suitable for everyone, even those who do not like stubborn old socks. A very good base or why not treat sock wool . Should be in everyone's strumpgarderob . Size 39-42 or 43-46 . 90% wool 7 % polyamide 3 % Lycra / spandex