Patent ID: 8151484

Claim:
An item of footwear comprising: a) an upper sole, shaped to receive a user's foot, and including a top surface, a bottom surface, a toe cap portion, a heel portion, a sole portion, which is formed of a lightweight, thermally insulative plastics material, and a plurality of channels integrated into the upper sole between the top surface and the bottom surface; b) a lower sole, formed of a resilient plastics material, the lower sole being attached to and at least partially covering the sole portion of the upper sole and being operative to protect the upper sole from direct physical contact with the ground and to minimize wear on the upper sole; c) an upper attached to the upper sole; and d) wherein the upper sole and the lower sole respectively comprise complimentary tabs and recesses such that the engagement of each tab with a corresponding recess aligns the upper sole with the lower sole.