A truck body is disclosed which is able to be mounted to a truck in such a way that the truck body can pivot relative to the truck between a lowered, travel orientation and a raised, dumping orientation. The truck body has a material carrying region, and the material carrying region has: a floor surface, and a curved transition (“the floor-to-front-wall-transition”) between the floor surface and a surface forming a front wall portion of the material carrying region. The radius of curvature of at least a portion of the floor-to-front-wall-transition is two meters or greater, which may help to reduce material carry-back.