My husband has multiple pairs of these socks, which he bought from a local golf store.  According to him, they are made of mostly cotton, breathable, and very comfortable. I ordered 7 packages, all together 21 pairs. The item I received, look and feel different than his socks. Examining them, material content is 95% poly, 4 % other fibers, and 1% elastane. They look and feel different in life, next to original Nike.  I am convinced these socks are not the original Nike. They are going back. -Dec7, 2012 My husband thinks it feels great so we are giving them a chance. So it is changed from 1 star to 3 stars. Will update later again.