Smaller travel trailers and pop-ups are still made with touring in mind. These generally are less than long and contain simple amenities. By design, they are lightweight and quick to set up or prepare for travel. Most weigh less than and can be towed with a large car or small truck depending upon its towing capacity. Lightweight pop-up trailers weighing less than , such as the Combi-camper and Kamparoo can be towed even by small economy cars. Some exceptionally light travel trailers can be pulled by motorcycle or even bicycle. Fiberglass body construction entered the U.S. scene in 1971 with the introduction of the first U.S.-produced mini travel trailer, called the Playpac.