The Sock Pro is a little rubber disc perforated in the center to allow the toes of a pair of socks to be slipped through its center. The perforations hold the socks together through laundry and drying, and they keep socks paired in the dresser drawer. I've been using these thingies about a year and half and they really save me time and annoyance at the laundromat. For those with families, you can buy them in different colors and assign one color to each family member. It takes some effort to drag heavier socks through the hoops, but I have been able to use them with Thor-Lo maximum padding running socks and they work fine.