| CPC A43B 3/26 (2013.01) [A43B 3/24 (2013.01); A43B 3/246 (2013.01); A43B 11/00 (2013.01)] | 20 Claims |

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1. An article of footwear comprising:
a sole structure defining a forwardmost toe location of the article of footwear; and
a heel assembly defining a rearmost heel location of the article of footwear and comprising an upper heel and a lower heel movable relative to the sole structure, wherein one of the lower heel and upper heel defines a track and the other of the lower heel and the upper heel includes a protrusion slidably received in the track,
wherein the upper heel is movable relative to the sole structure and the lower heel in a longitudinal direction of the article of footwear between a closed position and an open position.
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