Impact absorption structure

An article of manufacture, comprising:

• an energy absorber comprising an extruded plastic first layer having a first plurality of corrugations and an extruded plastic second layer having a second plurality of corrugations and wherein individual corrugations of the first plurality are nested within individual corrugations of the second plurality and wherein the first and second layers differ from each other in at least one structural or compositional aspect.

An energy absorbing structure, comprising:

• a energy absorber comprising a first plastic layer having a first plurality of surface features and a second plastic layer with a second plurality of surface features wherein the surface features of one layer are nested within the surface features of the other layer and wherein the first and second layers differ from each other in at least one structural or compositional aspect.

A method of manufacturing an energy absorber, comprising:

• nesting individual surface features of a first plurality of surface features on a first plastic layer into individual surface features of a second plurality of surface features on a second plastic layer, wherein the first and second layers differ from each other in at least one structural or compositional aspect.

A method of manufacturing an energy absorber, comprising:

• extruding a first layer comprising a first and a second plurality of surface features, wherein the first and second plurality of surface features are separated by a hinge.