MULTILAYER LATTICE PROTECTIVE EQUIPMENT

1 . An article of protective equipment for protecting a body part of a user, the article of protective equipment comprising:

a lattice structure comprising a plurality of struts forming three dimensional volumetric structures, the lattice structure comprising:

a plurality of internal layers, each internal layer having at least one different physical property from the other internal layers, wherein the plurality of internal layers comprises at least one internal layer having physical properties such that the at least one internal layer is capable of compressing more than at least one other internal layer in response to an impact to the article of protective equipment.

2 . The article of protective equipment of claim 1 , wherein the lattice structure further comprises an integral comfort layer disposed on a proximal side of the lattice structure that is closest to the body part when worn.

3 . The article of protective equipment of claim 2 , wherein the lattice structure comprises an internal shell disposed on an outer surface of at least a portion of the integral comfort layer.

4 . The article of protective equipment of claim 3 , wherein the lattice structure comprises a first internal layer attached to at least a portion of an outer surface of the internal shell, a second internal layer attached to at least a portion of an outer surface of the first internal layer, and a third internal layer attached to at least a portion of an outer surface of the second internal layer.

5 . The article of protective equipment of claim 4 , wherein the first internal layer comprises a lower density portion adjacent to the internal shell and a higher density portion distal from the internal shell.

6 . The article of protective equipment of claim 4 , wherein the third internal layer comprises a lower density portion adjacent to the second internal layer and a higher density portion distal from the second internal layer.

7 . The article of protective equipment of claim 1 , further comprising at least one foam pad disposed on a proximal side of the lattice structure.

8 . The article of protective equipment of claim 1 , wherein the lattice structure further comprises an integral shell as an outermost surface of the lattice structure.

9 . The article of protective equipment of claim 1 , wherein an outermost surface of the lattice structure comprises at least one first attachment portion for attaching a rigid shell.

10 . The article of protective equipment of claim 9 , wherein the rigid shell is removably attached to the lattice structure.

11 . The article of protective equipment of claim 9 , wherein the rigid shell comprises multiple separate portions.

12 . The article of protective equipment of claim 1 , wherein the article of protective equipment comprises a helmet, wherein a thickness of at least one of the internal layers is increased in an area corresponding to an occipital bone of the user when worn.

13 . The article of protective equipment of claim 1 , wherein the lattice structure comprises at least one of a linear energy absorption layer or a rotational energy absorption layer.

14 . The article of protective equipment of claim 1 , wherein the lattice structure comprises:

a first set of volumetric structures disposed in a first orientation such that the first set of volumetric structures is configured to deflect a first force from a first direction to a second direction; and

a second set of volumetric structures adjacent to the first set of volumetric structures, wherein the second set of volumetric structures is disposed in a second orientation different from the first orientation such that the second set of volumetric structures is configured to deflect a second force from a third direction to a fourth direction.

15 . An article of protective equipment for protecting a body part of a user, the article of protective equipment comprising:

a lattice structure comprising a plurality of struts forming volumetric structures, the lattice structure comprising:

a plurality of internal layers, each internal layer having at least one different property, wherein the plurality of internal layers comprises at least one internal layer comprising struts having a first diameter such that the at least one internal layer is capable of compressing more than at least one other internal layer in response to an impact to the article of protective equipment.

16 . The article of protective equipment of claim 15 , wherein the lattice structure comprises an integral comfort layer disposed as a portion of the lattice structure that is closest to the body part when worn, wherein the integral comfort layer comprises struts having a second diameter, wherein the first diameter is greater than the second diameter.

17 . The article of protective equipment of claim 16 , wherein the lattice structure comprises an internal shell disposed on an outer surface of at least a portion of the integral comfort layer.

18 . The article of protective equipment of claim 17 , wherein the lattice structure comprises a first internal layer attached to at least a portion of an outer surface of the internal shell, a second internal layer attached to at least a portion of an outer surface of the first internal layer, and a third internal layer attached to at least a portion of an outer surface of the second internal layer.

19 . The article of protective equipment of claim 18 , wherein the first internal layer comprises a portion disposed adjacent to the internal shell having larger diameter struts compared to a portion distal from the internal shell.

20 . The article of protective equipment of claim 18 , wherein the third internal layer comprises a lower density portion adjacent to the second internal layer and a higher density portion distal from the second internal layer.