Patent ID: 7979936

Claim:
A method, comprising: providing an upper member and a sole member for a foot-receiving device; selecting at least a portion of an impact attenuating device at least in part based on a characteristic of an intended user of the foot-receiving device or a characteristic of an intended use of the foot-receiving device; and engaging at least the portion of the impact attenuating device with at least one of the upper member or the sole member of the foot-receiving device, wherein the impact attenuating device includes: (a) a first element having: (i) a first base portion, (ii) a second base portion, (iii) a first concave side wall portion extending between the first and second base portions, and (iv) a second concave side wall portion extending between the first and second base portions, and (b) a second element that includes a first convex side wall portion and a second convex side wall portion, wherein an internal space is defined between the first concave side wall portion, the second concave side wall portion, the first convex side wall portion, and the second convex side wall portion, and wherein the first concave side wall portion, the second concave side wall portion, the first convex side wall portion, and the second convex side wall portion are arranged around the internal space.