Removable outsole elements for articles of footwear

1. An article of footwear comprising:

an upper:

a midsole that is attached to the upper, the midsole being resiliently compressible to provide cushioning for the article of footwear, the midsole including a base that partially defines a ground engaging surface of the article of footwear, the midsole also including a lug that extends from the base, the lug being resiliently compressible; and

an outsole element having a body and a cavity defined in the body, the cavity receiving the lug to removably attach the outsole element to the lug, the body partially defining the ground engaging surface, the body configured to provide traction for the article of footwear.

2. The article of footwear of claim 1 , wherein the lug includes a base end that is attached to the base, wherein the lug includes a terminal end that is opposite the base end, wherein the lug includes a radial surface that extends between the base end and the terminal end, wherein the outsole element includes an inner surface that defines the cavity, and wherein the inner surface removably engages the radial surface.

3. The article of footwear of claim 2 , wherein one of the inner surface and the radial surface includes a projection,

wherein the other of the inner surface and the radial surface includes an opening that receives the projection to removably engage the lug and the outsole element.

4. The article of footwear of claim 1 , further comprising an object that is removably retained on the lug via the outsole element.

5. The article of footwear of claim 4 , wherein the object is a strap with an opening that receives the lug, wherein the strap is disposed between the base and the outsole element, and wherein the strap extends from the lug toward the upper.

6. The article of footwear of claim 4 , wherein the outsole element includes a first end with a first opening, wherein the outsole element includes a second end with a second opening, and wherein the object is exposed through the second opening.

7. The article of footwear of claim 1 , wherein the outsole element includes a first end with a first opening and a second end with a second opening.

8. The article of footwear of claim 1 , wherein the outsole element continuously extends about the lug.

9. An article of footwear comprising:

an upper; and

a sole structure that is attached to the upper, the sole structure including:

a base that partially defines a ground engaging surface of the article of footwear;

a lug that extends from the base, the lug including a base end that is attached to the base, the lug including a terminal end that is opposite the base end, the lug including a radial surface that extends between the base end and the terminal end; and

a sole element having a body and a cavity defined in the body, the cavity receiving the lug to removably attach the sole element to the lug, the body partially defining the ground engaging surface, the body configured to provide traction for the article of footwear, the body including a side wall that at least partially covers the radial surface, the body further comprising a side aperture defined in the side wall, the radial surface of the lug being exposed through the side aperture.

10. The article of footwear of claim 9 , wherein the base and the lug are integrally attached and cooperate to define a one-piece midsole of the sole structure, wherein the lug and the base are resiliently compressible under the weight of a wearer of the article of footwear.

11. The article of footwear of claim 9 , wherein the radial surface of he lug includes a projection, wherein the side wall receives the projection to removably attach the sole element to the lug.

12. The article of footwear of claim 1 wherein the projection is a flange, and wherein the side wall includes an undercut that receives the flange.

13. The article of footwear of claim 9 , wherein the side wall is one of a plurality of side walls of the sole element;

wherein the plurality of side wails are arranged generally in a polygonal shape;

wherein the side aperture is one of a plurality of side apertures; and

wherein the plurality of side apertures are each defined in respective ones of the plurality of side walls.

14. The article of footwear of claim 9 , wherein the sole element includes a first end that faces the base, wherein the first end includes a first opening that receives the lug, wherein the sole element further includes a second end that faces away from the base, and wherein the second end includes a second opening.

15. An article of footwear comprising;

an upper;

a midsole that is attached to the upper, wherein the midsole is resiliently compressible, wherein the midsole includes a base that partially defines a ground engaging surface, wherein the midsole includes a first member and a second member, wherein the first member and the second member cooperate to define a lug that extends from the base; and

an outsole element having a body and a cavity defined in the body, the cavity receiving the first member and the second member to removably attach the outsole element to the lug, the body partially defining the ground engaging surface, the body configured to provide traction for the article of footwear.

16. The article of footwear of claim 15 , wherein at least one of the first member and the second member includes a projection, and

wherein the outsole element includes an opening that receives the projection to removably attach the outsole element to the lug.

17. The article of footwear of claim 15 , wherein the first member and second member cooperate to define a flange of the lug, and

wherein the outsole element includes an internal under cut that receives the flange.

18. The article of footwear of claim 15 , wherein the first member includes a first base end that is attached to the base and a first terminal end that is opposite the first base end,

wherein the second member includes a second base end that is attached to the base and a second terminal end that is opposite the second base end, and

wherein the first terminal end and the second terminal end are substantially flush with each other.