Component shoe

1. A footwear comprising a sole and an upper, wherein the sole comprises a bottom surface, for contacting the ground during use, and a sidewall that extends from the bottom surface and is placed at the outer periphery of the sole, wherein the upper is removable attachable and/or attached to the sole, wherein the footwear comprises an attachment system suitable to removably attach the upper to the sole, wherein said attachment system comprises a plurality of lugs affixed to the sole and extending outwardly from the sidewall, and a plurality of holes in the upper, wherein the holes are configured to engage with the plurality of lugs, wherein the upper has a flat configuration that when attached to the sole, wraps the foot of the user, wherein each lug includes a through-opening, wherein the through-opening has a top-down direction, and/or the through-opening is sloping or perpendicular with respect to the bottom surface of the sole and/or the through-opening is in a vertical direction when the bottom surface of the footwear is resting on the ground.

2. The footwear according to claim 1 , wherein said holes are placed near a bottom edge of the upper, wherein said bottom edge is facing towards the sole.

3. The footwear according to claim 1 , wherein the holes have a shape matching the shape of the plurality of lugs, including a rectangular shape or circular shape.

4. The footwear according to claim 1 , wherein the footwear or the attachment system further comprises an attachment element, wherein the attachment element comprises a lace element and/or at least one peg element, wherein the attachment element is laced and/or inserted through the through-openings of the lugs.

5. The footwear according to claim 1 , wherein the sole is made of a rubber material or of a polyurethane (PU) material or of a thermoplastic polyurethane (TPU) and/or wherein the upper is made of leather, textile, synthetic material or mixture thereof, and/or comprising a midsole, wherein the midsole is at least partially enclosed by the sidewall of the sole, and/or wherein the midsole is made of ethyl-vinyl-acetate (EVA), polyurethane (PU) allowing the comfort and the support for the user's foot during use.

6. The footwear according to claim 1 , wherein the upper is a single piece of material shaped, during use, to at least wrap the foot of the user or wherein the upper is made from at least two parts, including a tip or front portion, to cover the fore-foot portion of the foot, a heel portion, to encircle the heel of the foot, and/or one or two side portions, wherein said portions are connected together to determine the upper.

7. The footwear according to claim 2 , wherein the upper comprises a series of cuts or splits and a corresponding series of wings, at the bottom edge of the upper, separated the one to the other by said cuts or splits, wherein each wing has a rectangular conformation, having a base corresponding to a portion of the bottom edge and two sides defined by the cuts or splits.

8. A method for assembling a footwear comprising a sole and an upper, wherein the sole comprises a bottom surface, for contacting the ground during use, and a sidewall that extends from the bottom surface and is placed at the outer periphery of the sole, wherein the upper is removable attachable and/or attached to the sole, wherein the footwear comprises an attachment system suitable to removably attach the upper to the sole, wherein said attachment system comprises a plurality of lugs affixed to the sole and extending outwardly from the sidewall, and a plurality of holes in the upper, wherein the holes are configured to engage with the plurality of lugs, wherein the upper has a flat configuration that when attached to the sole, wraps the foot of the user,

wherein each lug includes a through-opening, wherein the through-opening has a top-down direction, and/or the through-opening is sloping or perpendicular with respect to the bottom surface of the sole and/or the through-opening is in a vertical direction when the bottom surface of the footwear is resting on the ground,

the method comprising the steps of:

providing a sole comprising a bottom surface for contacting the ground during use, and a sidewall that extends from the bottom surface and is placed at the outer periphery of the sole,

providing an upper, wherein the upper has a flat configuration, which, when attached to the sole, at least wraps the foot of the user,

comprising the step of providing an attachment system to removably attach the upper to the sole,

wherein said step of providing the attachment system comprises:

providing a plurality of lugs affixed to the sole and extending outwardly from the sidewall,

providing a plurality of holes in the upper, wherein said holes are placed near a bottom edge of the upper, wherein said bottom edge is facing towards the sole,

placing the upper over the sole and the holes over the lugs,

engaging the holes with the plurality of lugs, including inserting each lug inside a corresponding hole and thus attaching the upper to the sole, and

removably attaching the upper to the sole.

9. The method according to claim 8 , comprising the steps of:

providing a attachment element, wherein the attachment element comprises a lace element and/or at least one peg element,

lacing and/or inserting and/or passing the lace element and/or the at least one peg element through a through-openings provided in each lug.

10. The method according to claim 8 , comprising the steps of:

providing a midsole,

inserting the midsole inside the sole and/or inside the sidewall by cementing or molding the midsole in the sole or

fixing the midsole to the sole by a suitable technique or

pouring or dropping the material composing the midsole, in a fluid state, inside the sole, and then letting setting or curing the midsole inside the sole until it reaches a solid state.

11. The method according to claim 8 , wherein said step of providing the upper comprises providing at least two parts of the upper, including a tip or front portion to cover the fore-foot portion of the foot, a heel portion to encircle the heel of the foot, and/or one or two side portions, connecting together said portions to determine a shape of the upper, including connecting the tip or front portion to the side portions and the side portions to the heel portion.

12. The method according to claim 8 , wherein said step of providing the upper comprises the steps of:

providing the upper having a flat configuration or providing the upper, wherein said upper comprises a series of cuts or splits and a corresponding series of wings, at the bottom edge of the upper, separated the one to the other by said cuts or splits, wherein each wing has a rectangular conformation, having a base corresponding to a portion of the bottom edge and two sides defined by the cuts or splits,

folding or curving said wings in order to give the upper a curved or shaped configuration, to cover at least a part of the foot,

placing side by side the base of at least two wings,

engaging the holes provided in each wing with the plurality of lugs, including inserting each of the plurality of lugs inside a corresponding hole and attaching the upper to the sole.

13. An attachment system for removably attaching an upper to a sole of a footwear, the footwear comprising the sole and the upper, wherein the sole comprises a bottom surface, for contacting the ground during use, and a sidewall that extends from the bottom surface and is placed at the outer periphery of the sole, wherein the upper is removable attachable and/or attached to the sole, wherein the footwear comprises an attachment system suitable to removably attach the upper to the sole, wherein said attachment system comprises a plurality of lugs affixed to the sole and extending outwardly from the sidewall, and a plurality of holes in the upper, wherein the holes are configured to engage with the plurality of lugs, wherein the upper has a flat configuration that when attached to the sole, wraps the foot of the user,

further comprising a plurality of lugs, placed in the sole and extending outwardly from the sidewall of the sole, and a plurality of holes, placed in the upper, wherein the holes are configured to engage with the plurality of lugs, and an attachment element, wherein each lug has a rectangular or circular shape departing from said sidewall and includes a through-opening, wherein said attachment element comprises a lace element and/or at least one peg element, wherein said attachment element is laced and/or inserted through through-openings of the lugs.

14. A footwear comprising a sole and an upper, wherein the sole comprises a bottom surface, for contacting the ground during use, and a sidewall that extends from the bottom surface and is placed at the outer periphery of the sole, wherein the upper is removable attachable and/or attached to the sole, wherein the footwear comprises an attachment system suitable to removably attach the upper to the sole, wherein said attachment system comprises a plurality of lugs affixed to the sole and extending outwardly from the sidewall, and a plurality of holes formed in the upper, wherein the plurality of holes match the plurality of lugs in position and shape and wherein the plurality of lugs are inserted into the plurality of holes to removably attach the upper with the sole,

wherein the upper has a flat configuration that when attached to the sole, wraps the foot of the user,

wherein the upper comprises a plurality of cuts or splits made at a bottom edge of the upper and oriented towards an inner area or central portion of the upper, and a plurality of wings at the bottom edge of the upper, each separated by the cuts or splits.

15. The footwear of claim 14 , wherein each wing has a rectangular conformation, a base trait corresponding to a portion of the bottom edge and two sides defined by the cuts or splits.