memoi three-in-one mix & match crew socks black one size memoi forget reversible -- how about three-in-one? memoi's three-in-one polka dot crew and fishnet socks are a one-of-a-kind staple, double-layered socks which can be worn three different ways. wear just the bottom layer for a work-appropriate polka dot crew, wear just the top layer for a comfortable fishnet sock with reinforced toe and cuff, or wear them together for a show-off ready layered look. who knew an item of clothing so basic could offer so much versatility?