We tow trailers coast to coast with our 2001 3500 cab and chassis. We have a sleeper on it and needed a bed that wouldn't interfere with our loads, but would give us storage as we spend a lot of time on the road. We went to All American Truck Beds in Elkhart, In. and bought this bed. We are thrilled. It is fiberglass and weighs less than metal beds we had shopped. Going down the highway, a truck in front of us lost his drive shaft and we had a trailer on our truck with this projectile coming towards us. Luckily it hit the highway but went up under our truck and we heard it hit the bed of the truck. We figured the bed being fiberglass, we probably had major damage. As soon as we could pull over, my husband crawled under the truck and you could see where it hit but the floor of the bed was not damaged. Just thought I would pass this along to all you toters our there. We could not be more pleased, and think this product deserves a word of praise.