Patent ID: 9693601
Date: 2017-07-04
CPC Classifications: A43B,A43D

Claim:
1. An article of footwear having a first insulation zone, a second insulation zone, and a third insulation zone, the article of footwear comprising: a first layer of insulation materials disposed throughout the first insulation zone, the second insulation zone, and the third insulation zone, the first layer of insulation having a first insulation level; a second layer of insulation materials disposed throughout the second insulation zone and the third insulation zone and not being disposed in the first insulation zone, the second layer of insulation having a second insulation level; a third layer of insulation materials disposed throughout the third insulation zone and not being disposed in the first insulation zone or the second insulation zone, the third layer having a third insulation level, so that the first insulation zone has an insulation level equal to the first insulation level, the second insulation zone has an insulation level equal to the combination of the first and second insulation levels and the third insulation zone has an insulation level equal to the combination of the first, second, and third insulation levels; and wherein the first insulation zone includes a heel region of the footwear, the second insulation zone includes a main foot region of the article of footwear excluding both the heel region and a toe region of the article of footwear, and the third insulation zone includes the toe region of the article of footwear.