Organic cotton boot sock. 1x1 rib at ankle and arch helps keep the sock in place all day. 12" Crew length. Linen in footbed for thermo regulation and added strength. Loose knit shin construction making it easy to pull over your pant leg for hiking. 78% Organic Cotton, 14% Linen, and 8% Spandex Mid weight/Heavy yarn. Manufactured in Tokyo, Japan. One Size / Mens US 7.5 - 12 Druthers Organic Cotton Defender Boot Sock - Navy Mélange