Latticed comfort liner

1. A comfort liner for a helmet, the comfort liner comprising:

a latticed structure configured to couple to the helmet, the latticed structure defining a surface that follows a contour of a portion of the helmet, the surface having a minor axis and a major axis, the latticed structure defining a radial dimension that is generally orthogonal to the minor axis and to the major axis,

wherein the latticed structure is elastically compressible in the radial dimension, and

wherein the latticed structure is configured to prevent rotation of the helmet relative to a wearer's head along the minor axis.

2. The comfort liner of claim 1 , further comprising a coupler configured to couple the latticed structure to an impact liner that is disposed between the latticed structure and a shell of the helmet.

3. The comfort liner of claim 1 , wherein the latticed structure has multiple layers of different lattice patterns.

4. The comfort liner of claim 3 , wherein the multiple layers include a layer that has a plurality of triangular structures arranged in an array of columns and rows.

5. The comfort liner of claim 4 , wherein every fifth triangular structure in one of the rows has a vertex that is radially aligned with a convergence point that is disposed in a different layer than the layer having the plurality of triangular structures.

6. The comfort liner of claim 1 , wherein the latticed structure is configured to prevent rotation of the helmet relative to the wearer's head in a median dimension.

7. The comfort liner of claim 6 , wherein the latticed structure is configured to allow rotation of the helmet relative to the wearer's head in a frontal dimension.

8. A comfort liner for a helmet, the comfort liner comprising:

a latticed structure configured to couple to the helmet,

wherein the latticed structure is elastically compressible and configured to prevent rotation of the helmet relative to a wearer's head in at least one dimension; and

a receptacle disposed in the latticed structure, the receptacle configured to receive a pin that is configured to extend through the receptacle to an impact liner or a shell of the helmet.

9. The comfort liner of claim 8 , wherein the receptacle has an inner collar, an outer collar, and a plurality of columns that extend from the inner collar to the outer collar, the columns being spaced apart from each other about a perimeter of the receptacle.

10. The comfort liner of claim 9 , wherein the columns are elastically collapsible.

11. The comfort liner of claim 9 , wherein the receptacle defines a radial axis, and the columns have a non-circular cross-section as measured in a dimension that is transverse to the radial axis.

12. The comfort liner of claim 1 , further comprising a side unit, the latticed structure defining a top unit configured to be disposed radially outward from a top of the wearer's head or a frontal unit configured to be disposed radially outward from the wearer's forehead, the side unit including another latticed structure configured to couple to the helmet, wherein the other latticed structure of the side unit is elastically compressible and prevents rotation of the helmet relative to the wearer's head in a dimension that is transverse to another dimension included in the at least one dimension.

13. The comfort liner of claim 1 , further comprising a frontal unit, the latticed structure defining a top unit configured to be disposed radially outward from a top of the wearer's head, the frontal unit including another latticed structure configured to couple to the helmet, wherein the other latticed structure of the frontal unit is elastically compressible and prevents rotation of the helmet relative to the wearer's head in a dimension that is included in the at least one dimension.

14. A comfort liner for a helmet, the comfort liner comprising:

a latticed structure configured to couple to the helmet,

wherein the latticed structure is elastically compressible and configured to prevent rotation of the helmet relative to a wearer's head in at least one dimension; and

a fabric cover that is configured to cover the latticed structure,

wherein the cover has an inner side and an outer side, the outer side of the cover defining an opening that is configured to align with a coupler that extends from the latticed structure to facilitate coupling the latticed structure to the helmet.

15. A comfort liner for a helmet having a shell and an impact liner, the comfort liner comprising:

an elastically compressible latticed structure configured to couple to the impact liner and prevent rotation of the helmet relative to the wearer's head in a median dimension.

16. The comfort liner of claim 15 , wherein the latticed structure has multiple layers of different lattice patterns.

17. The comfort liner of claim 15 , wherein the latticed structure is configured to allow rotation of the helmet relative to the wearer's head in a frontal dimension.

18. The comfort liner of claim 1 , wherein the latticed structure is configured to allow rotation of the helmet along the major axis.

19. A comfort liner for a helmet, the comfort liner comprising:

a latticed structure configured to couple to the helmet, the latticed structure defining a surface that follows a contour of a portion of the helmet, the surface having a minor axis and a major axis,

wherein the latticed structure is elastically compressible,

wherein the latticed structure is configured to prevent rotation of the helmet relative to a wearer's head along the major axis.

20. The comfort liner of claim 19 , wherein the latticed structure is configured to prevent rotation of the helmet relative to the wearer's head in a frontal dimension.

21. The comfort liner of claim 20 , wherein the latticed structure is configured to allow rotation of the helmet relative to the wearer's head in a median dimension.

22. The comfort liner of claim 19 , wherein the latticed structure is configured to allow rotation of the helmet along the minor axis.

23. A comfort liner for a helmet, the comfort liner comprising:

a first latticed structure configured to couple to the helmet; and

a second latticed structure configured to couple to the helmet,

wherein the first and second latticed structures are elastically compressible,

wherein the first latticed structure is configured to prevent rotation of the helmet relative to a wearer's head in a median dimension, and

wherein the second latticed structure is configured to prevent rotation of the helmet relative to the wearer's head in a frontal dimension.

24. The comfort liner of claim 23 , wherein the first latticed structure is configured to allow rotation of the helmet in the frontal dimension.

25. The comfort liner of claim 24 , wherein the second latticed structure is configured to allow rotation of the helmet in the median dimension.