A method of manufacturing an article of footwear includes positioning an upper on a last that defines openings connected by one or more channels in the last, injecting a material through the one or more channels in the last, and forming a structure on the upper with the material.

A method of manufacturing an article of footwear includes positioning an upper on a last that defines openings connected by one or more channels in the last, injecting a material through the one or more channels in the last, and forming a structure on the upper with the material.

A method of manufacturing an article of footwear includes positioning an upper on a last that defines openings connected by one or more channels in the last, injecting a material through the one or more channels in the last, and forming a structure on the upper with the material.

An article of footwear and a method of manufacturing the same are provided. The article comprises an upper fixedly attached to a sole structure. The upper may comprise a wall including an inner layer and an outer layer coupled to the inner layer, such that the inner layer and the outer layer define a closed pocket therebetween. A layer of scrap particulate matter is disposed in the closed pocket. The method comprises dividing scrap material into a plurality of discrete pieces of scrap particulate matter via a grinding or shredding process, inserting a layer of the discrete pieces of scrap particulate matter into the closed pocket formed between the inner layer and the outer layer of the wall of the upper. The outer layer may be formed of a sufficiently transparent material, such that the layer of scrap particulate matter is at least partially visible therethrough.

An article of footwear and a method of manufacturing the same are provided. The article comprises an upper fixedly attached to a sole structure. The upper may comprise a wall including an inner layer and an outer layer coupled to the inner layer, such that the inner layer and the outer layer define a closed pocket therebetween. A layer of scrap particulate matter is disposed in the closed pocket. The method comprises dividing scrap material into a plurality of discrete pieces of scrap particulate matter via a grinding or shredding process, inserting a layer of the discrete pieces of scrap particulate matter into the closed pocket formed between the inner layer and the outer layer of the wall of the upper. The outer layer may be formed of a sufficiently transparent material, such that the layer of scrap particulate matter is at least partially visible therethrough.

An article of footwear having an upper portion and a footbed portion that may be aligned with apertures proximate specified edges or locations. The footbed portion includes a concave edge extending between the footbed toe end and the footbed heel end along the footbed medial side and a plurality of forming apertures along the medial side. The upper portion also includes a plurality of forming apertures extending along the medial side.

An article of footwear having an upper portion and a footbed portion that may be aligned with apertures proximate specified edges or locations. The footbed portion includes a concave edge extending between the footbed toe end and the footbed heel end along the footbed medial side and a plurality of forming apertures along the medial side. The upper portion also includes a plurality of forming apertures extending along the medial side.

A method of manufacturing an article of footwear includes positioning an upper on a last that defines openings connected by one or more channels in the last, injecting a material through the one or more channels in the last, and forming a structure on the upper with the material.

A method of manufacturing an article of footwear includes positioning an upper on a last that defines openings connected by one or more channels in the last, injecting a material through the one or more channels in the last, and forming a structure on the upper with the material.

Presented are systems, methods, and devices for manufacturing articles of footwear using sacrificial straps to secure segments of the footwear to a manufacturing fixture. A method for manufacturing an article of footwear, such as an athletic shoe, includes providing first and second segments of the footwear's upper, such as the vamp and heel counter. A sacrificial strap is removably attached at opposing ends thereof to the first segment, e.g., proximate a read edge of the vamp. The first segment is placed on a manufacturing fixture, such as a foot-shaped last, and securely attached to the fixture by positioning the sacrificial strap around and against the fixture. The second segment of the upper is attached, e.g., via stitching or bonding, to the first segment. Once attached, the upper is removed from the manufacturing fixture, and the sacrificial strap is cut, torn or otherwise permanently disconnected from the footwear.