Featuring a very fine, light weight knit construction, perfect for summer wear and dress shoes. We use Mercerised Cotton, aka Pearl Cotton, in our pure cotton sock because it is simply better. It takes dye more more readily, giving stronger, longer lasting (fade resist) lustrous colour. The yarn is pre-shrunk, so will not shrink over time (washes) like ordinary cotton socks. It is stronger than the cheap, untreated cotton yarn commonly used in socks and 3 times more absorbent than usual. Making it much more comfortable and longer wearing than your average cotton sock.