An upper for an article of footwear includes a first material defining a void operable to selectively receive a foot. The first material includes an outer surface. The upper also includes a first edge at least partially circumscribing the void at an uppermost extremity of the upper and a second edge disposed at a lowermost extremity of the upper. The upper further includes a first biasing member (i) disposed at the outer surface of the upper, (ii) attached to the first material, and (iii) spaced apart from the first edge and the second edge. The first biasing member is operable to exert a biasing force on the first material to bias the first edge away from the second edge.