Retractable Pickup Truck Roll Up Tonneau Tri Fold Bed Cover 5.6 FTRetractable Pickup Truck Roll Up Tonneau Tri Fold Bed Cover 5. 6 FT Eager to protect your truck bed from the effects of the outdoors? Our Tonneau Cover was designed to give any truck bed full coverage to prevent your truck bed from being damaged by things that fall into it as you drive. With its patented side rail seal system, the truck bed cover will tightly fasten itself onto your truck's railings like no other. This ensures that the strongest wind