Interdigitated cellular cushioning

A method of absorbing kinetic energy comprising:

• monotonically collapsing a first sheet of resilient material including a first binding layer and a first array of void cells protruding from the first binding layer, wherein each of the void cells has a wall;
• monotonically collapsing a second array of void cells protruding from a second binding layer of a second sheet of resilient material, wherein each of the void cells has a wall, with the walls of the second array of void cells unique from the walls of the first array of void cells, without collapsing the second binding layer, wherein a peak of each void cell in the first array contacts the second binding layer and a peak of each void cell in the second array contacts the first binding layer, and wherein at least one void cell in the first array is attached to the second binding layer and at least one void cell in the second array is attached to the first binding layer.

An interdigitated cellular cushioning system comprising:

• a first sheet of resilient material including a first binding layer and a first array of hemiellipsoidal void cells each having a wall protruding from the first binding layer;
• and
• a second sheet of resilient material including a second binding layer and a second array of hemiellipsoidal void cells each having a wall protruding from the second binding layer, the walls of the second array of hemiellipsoidal void cells being unique from the walls fo the first array of hemiellipsoidal void cells, wherein the void cells have thinner resilient material at a base of each of the void cells than at a peak of each of the void cells, wherein the void cells are configured to monotonically collapse under a load, wherein a peak of each void cell in the first array contacts the second binding layer and a peak of each void cell in the second array contacts the first binding layer, wherein at least one void cell in the first array is attached to the second binding layer and at least one void cell in the second array is attached to the first binding layer, and wherein the void cells in the first array of void cells are spaced equally from the void cells in the second array of void cells.