This Florence Cotton Bamboo Mens Dress Sock is the most popular men's sock that Florence makes (according to the distributor). They are ribbed and come 3 in a pack. These are model 190. Bamboo is very soft, great for people that are more sensory. These socks have a seamless toe. 80% Rayon from Bamboo, 10% Nylon, 10% Spandex.