Socks Covers - Easy Cover 2 pairs set x 2 Jersey material, with rubber band and non-slip Cushioned sole with cotton sole lining Can be worn year-round, from air conditioning to winter cold protection The light blue (light purple) ones are thin, so I think they are for summer. I bought them but didn't use them, so I'm selling them. Size: M, indicated as 22-23 and 22-24 *Unused, stored in a closet