Truxedo 359101 Original Soft Roll-Up Tonneau Cover Single-person usability of dual latch system at the tailgate allows for quick release and roll up, while maintaining security The Original TruXedo roll-up tonneau cover adds aerodynamic contours to your truck, improving MPG up to 10% Adds a sleek appearance on any truck and aerodynamic contours to your truck, improving MPG up to 10%. Simple clamp-on rails and headers requiring no drilling or cutting means installation in as little as 20 minutes, while industrial strength Velcro attaches the cover to the rails keeping it tight and taut and reducing wear and tear Tension control knob requires no tools, adjusting automatically to keep the cover tight and taut, while exclusive side and corner sealing keeps weather elements out of truck bed to protect cargo