Bumper for a vehicle

A bumper for a vehicle, comprising:

• at least one profile formed from a first material, the profile being open along an entire length thereof in a travel direction of the vehicle, and
• a ribbed structure including ribs formed from a second material, said ribbed structure being disposed along at least portions of the profile and at least in portions being connected to the profile in a force-fitting, form-fitting and/or materially integral manner to reinforce the profile,
• wherein the ribbed structure is formed from a fiber-reinforced plastics material and comprising a first region disposed in a central portion of the profile and having a first density, a second region disposed directly adjacent to and on opposite sides of the first region and having a second density, a third region disposed directly adjacent to and on opposite sides of the second region and having a third density, and a fourth region disposed directly adjacent to and on opposite sides of the third region and having a fourth density, wherein the first density is greater than the second density, and the second and fourth density are both greater than the third density.