With the passage of time, the bumpers have evolved a lot in design as well as structure. Earlier the bumpers were just made up of metal pieces which were placed in the front of the vehicle and the logic behind this was that car bumper would bear the damage before any potential damage is caused to the vehicle. These days the car bumpers consist of a beam as well as a fascia. Bumpers use foam which acts as a shock absorber which would save the bumper form getting damaged. These absorbers are then connected to springs and valves which provide easy compression and relaxation. Bumpers these days are generally made up of lightly weighed carbon fiber.