OK, so this is a well-made but "no frills" sock. The fabric is a bit thin, but soft. They stretch well, but as other reviewers note, there is no way that a size 13 foot will fit into this sock! I am a 11.5Mens, and they fit snug. I would say that anything over that size may be pushing it a bit!
Otherwise, they have worn well as socks to wear at the hospital or clinic with crocs.

Don't mistake them for proper "sport" socks though!!