Roof Rack
One popular misconception is that the front-to-back plastic strips on the top of many current cars serve as an attachable rain gutter. This is not a gutter, at least not for rack reasons. That type of vehicle is known as a "Naked Roof" automobile in the rack industry; a clip fit is the most popular fit method for this kind of roof.
In vehicles without pre-installed attachment points, Clip Fit roof racks tighten around the door frame. These vehicles have what are known as "Naked Roofs" or "Bare Roofs."