Recoverable energy absorber

An energy absorber comprising:

• a planar base sheet and
• a plurality of crush lobes that are reusable, the crush lobes extending from the base sheet, each crush lobe including an end wall and a side wall that reverts at least partially towards an un-deflected configuration after impact, thereby absorbing energy non-destructively after being impacted,
• the end wall of at least one crush lobe in the plurality of crush lobes including a number (X) of integrally-formed hollow countermeasures for dampening movement that may otherwise cause buzzes, squeaks and/or rattles between the end wall and an adjacent structure, where 1<=X<1000, the end wall also including an embossed ring in a support area for supporting the countermeasures, and wherein the countermeasure includes material from the support area and assumes a shape of the countermeasure.