Abstract: Articles of footwear include one or more expandable lugs (e.g., inflatable lugs) to hold at least some footwear component parts together. The expandable lug(s) may be included as part of an impact force-attenuating component (e.g., a fluid-filled bladder) for the article of footwear. The expandable lug(s) extend into receptacle(s) provided in a foot support component in an unexpanded (e.g., deflated or low-pressure) condition. Once within the receptacle(s), the expandable lug(s) are changed to an expanded (e.g., inflated or high-pressure) condition. The expanded lug(s) engage bearing surfaces provided inside the receptacle(s) to prevent the lugs from pulling out of the receptacles. The use of such expandable lugs for securing footwear component parts together may enable easy assembly of footwear components without use of adhesives and/or separate hardware components, which can enhance the recyclability, sustainability, and environmental friendliness of articles of footwear and their production methods.

Abstract: Articles of footwear in accordance with some aspects of this technology include a simple construction with each component made from a single material and fit together in a releasable manner. The invention enhances the recyclability and sustainable nature of the article of footwear and shoe. At least one specific aspect of this technology relates to footwear structure that may include three main parts: (a) an outer cage, which may include a single piece having features of: (i) a footwear upper and (ii) a sole structure having one or more traction element outer shells; (b) an inner upper component; and (c) a chassis and heel counter component with a bottom surface thereof that includes one or more traction element inserts and supports that fit inside the one or more traction element outer shells.

Abstract: Articles of footwear in accordance with some aspects of this technology include a foot support component and/or heel counter structure that includes openings, voids, and/or grooves around the heel area. These openings, voids, or grooves may make the heel counter structure more conformable, lightweight, and/or flexible. The openings, voids, or grooves may allow the heel or heel counter structure to conform better to the heel/foot of a user, providing and an “adaptive” response, adapting differently to different heels. The openings, voids, or grooves may be customized within the heel counter component based on the shape of the foot and/or heel of the user. Additionally or alternatively, these openings, voids, or grooves may make the heel construction better to conform to the wearer's heel and better to contain and move with the wearer's heel, e.g., during use and to improve flexion, comfort, and fit.

Abstract: Articles of footwear in accordance with some aspects of this technology include a simple construction that includes three main parts, with each made from a single material and fit together in a releasable manner. The invention enhances the recyclability and sustainable nature of the article of footwear and shoe. At least some more specific aspects of this technology relate to footwear structure that may include three main parts: (a) an outer cage, which may include a single piece having features of: (i) a footwear upper and (ii) a sole structure having one or more cleat outer shells; (b) an inner upper component; and (c) a chassis and heel counter component with a bottom surface thereof that includes one or more cleat inserts and supports that fit inside the one or more cleat outer shells.