Abstract: A crash cushion in accordance with the invention has a back plate and an energy absorbing body. The energy absorbing body has three or more sections having cartridges of differing impact absorption. Each of the cartridges is preferably made of layers of hexagonal remanufactured fibrous material cells. The cartridges are encased in water-impermeable bags. The body has a water-impermeable skin of rigid panels sealed together with a suitable tape, such as butyl tape, caulked on the outside, and painted. The panels may be of aluminum, and riveted together. In one embodiment, the body may have two sections, both with a water-impermeable skin, joined to one another with a hinge for storage and transportation. In another embodiment, the body may have a proximal section and a distal section, both sealed, and adapted to be joined together along a seam. The distal section can be removed and replaced separately from the proximal section, such as if only the distal section is damaged by a relatively low-speed impact.