Patent ID: 7921580

Claim:
A sole construction having an anterior end, a posterior end, a lateral side, and a medial side, the sole construction comprising: a stretchable layer, wherein the first stretchable layer has a first side and a second side; an actuator layer, wherein the actuator layer has a plurality of actuators, at least one actuator positioned on the first side of the first stretchable layer; a chamber layer, wherein the chamber layer has a plurality of chambers, at least one chamber positioned on the second side of the stretchable layer to receive a corresponding actuator on the first side of the stretchable layer; and a midsole having a surface area, a region of the surface area extending generally under and substantially from the lateral side to the medial side between the anterior and posterior ends of the sole construction, wherein the region of the surface area borders a portion of the chamber layer and substantially conforms to the shape of the portion of the chamber layer; wherein the chamber layer has a plurality of actuators, at least one actuator positioned on the second side of the stretchable layer; wherein the actuator layer has a plurality of chambers, at least one chamber positioned on the first side of the first stretchable layer to receive a corresponding actuator on the second side of the stretchable layer.