I had baby socks knitted for me using Marie cotton silk yarn! The feel is so gentle, it makes me want a pair for adults too! When turned inside out, the seams are on the outside, and the soft pile of Marie yarn is on the inside. Although they aren't two-tone, like the organic cotton baby pile socks, they're cute even with the inside pile showing and the opening slightly folded over♪ They're easy to wear and don't slip off easily, but they're knitted with a loose pile. The size looks perfect for newborns, but they stretch easily, so they're perfectly fine for babies around 1 year old. So, I think you can wear them for a long time.