The Dual-Line Enclosed Cargo Trailer is built using light weight aluminum. You simply unlatch the top, tilt the trailer deck, and slide the top cargo unit off. Your open utility trailer is now ready to load. When you need to attach the top, secure the winch strap to the top and winch your top in place, latch it to the frame of the trailer and your ready to go. Designed as a one person, 5 minute, operation, the top has easy sliding Teflon strips.