Patent attributes
An article of footwear an upper and a sole structure that defines a first portion and a second portion. The first portion is disposed proximate the medial side of the footwear, and the second portion is disposed proximate the lateral side. The first portion and the second portion are configured to move relative to each other. The article of footwear also includes a flexible biasing member including a first end, a second end, and a middle portion. The middle portion extends across the first portion and the second portion. The first and second ends extend out from the outer surface of the footwear from either the medial or lateral side. The middle portion of the biasing member is configured to bias the first and second portions toward each other.
