- Part of the Float Rope connection system that allows any number of Float Rope foam mattresses to be linked together or connect to a boat or dock to avoid floating away while relaxing on the mattress. Comes with one carabineer clip and has four places for connecting to the rope or other mattresses; top, bottom, and one on each side. Rolls up for easy storage. Molded vinyl construction, 26" x 72" x 1-1/2". Display boxed.