ZipRail Tonneau Covers use the same Belt Rail System technology that Bestop patented for Jeep soft tops. It's extremely and provides full-length continuous seal along the side rails and on rear tailgate bar. Incorporates the aluminum support cross rails right into the fabric for a smoother appearance, and faster installation. Stays flexible in any weather, so your tonneau is functional on the coldest days. No-drill installation takes about 15 minutes with clamps included. The fabric has a semi-rigid extrusion that simply slides into the Belt Rail channels on the side rails and tailgate bar. Quick, easy and . With fabric rolled up to the cab, there's 100 percent access to the bed.