The 2020 Keystone Montana 3721RL is a three-slide, rear-living fifth wheel, typically featuring the Legacy Package with a central vacuum, electric power cord reel, automatic leveling, and generator prep. It is approximately 39' 7" long, weighs around 13,261 lbs, and can sleep up to four people. Key features include residential-style appliances like a convection microwave, a residential three-burner cooktop with a large oven, a fireplace, and a drop frame design for extensive storage.