An enclosed car carrier is a trailer with hard or soft sides and a roof, so vehicles ride fully covered. Enclosed trailers range from single-car and two-car units to multi-car rigs, and many use liftgates instead of steep ramps, which helps with low-clearance cars.
Enclosed transport protects against rain, hail, road salt, rock chips and curious onlookers. It is the usual choice for collector cars, exotics, freshly restored or repainted vehicles, show cars and anything with very low ground clearance. Carriers in this segment often handle high-value vehicles routinely and may carry higher cargo limits, though that varies by carrier and should be confirmed.
Cost is the tradeoff. There are fewer enclosed trucks than open ones, each carries fewer vehicles, and the price per car is higher. Fewer trucks can also mean a wider pickup window on less traveled routes.
For dealers and marketplaces, offering both options lets the buyer decide. In an instant quote, open or enclosed is one of the inputs that changes the price, and it can be prefilled from the host page for listings that clearly call for it, such as a collector car. Compare with an open car carrier and read open vs. enclosed car transport.