Ever try to wrap something up in the back of your truck to keep it dry? Tarps are the usual solution - but it is very difficult to secure them and keep your cargo dry! Tarps flap and flail requiring you to adjust and re-tie them as you go on your way.
Bedder Covers work better! The plastic film covers the whole back of your truck and load - like plastic wrap on a plate of food. The material is adhesive enough to stay on the sides of your truck and clings to your cargo to reduce flapping but comes off easily and leaves no residue.