Method of customizing a boot

1. A method of manufacturing customized inserts for a boot that is at least partially thermoformable, the method comprising:

receiving numerical data corresponding to a tridimensional shape of a wearer's foot for use with the boot;

manufacturing a medial side insert based on the tridimensional shape of the wearer's foot, the medial side insert having a medial internal surface and a medial external surface conforming to a medial side shape of the wearer's foot; and

manufacturing a lateral side insert based on the tridimensional shape of the wearer's foot, the lateral side insert having a lateral internal surface and a lateral external surface conforming to a lateral side shape of the wearer's foot;

wherein the medial side insert and the lateral side insert are shaped to be insertable into the boot with a core dimensioned to generally correspond to a foot size of the boot, the medial internal surface and the lateral internal surface abutting respective outer surfaces of the core and

wherein manufacturing the medial side insert and manufacturing the lateral side insert is performed in absence of the core.

2. The method according to claim 1 , wherein manufacturing the medial side insert is done by a subtractive manufacturing process or an additive manufacturing process.

3. The method according to claim 1 , wherein manufacturing the lateral side insert is done by a subtractive manufacturing process or an additive manufacturing process.

4. The method according to claim 1 , further comprising manufacturing a rear insert based on the tridimensional shape of the wearer's foot, the rear insert having a rear internal surface and a rear external surface conforming to a rear shape of the wearer's foot.

5. The method according to claim 4 , wherein the rear insert is shaped to be insertable along with the medial side insert, the lateral side insert and the core into the boot, the rear internal surface abutting a rear surface of the core.

6. The method according to claim 4 , wherein manufacturing the rear insert further includes manufacturing the rear internal surface to be substantially flat.

7. The method according to claim 4 , wherein manufacturing the rear insert is done by a subtractive manufacturing process or an additive manufacturing process.

8. The method according to claim 4 , wherein manufacturing the rear insert is performed in absence of the core.

9. The method according to claim 4 , wherein the rear insert is configured to be inserted into the boot before inserting the core into the boot.

10. The method according to claim 1 , wherein the medial side insert and the lateral side insert are configured to be inserted into the boot before inserting the core into the boot.

11. The method according to claim 1 , wherein manufacturing the lateral side insert further includes manufacturing the lateral internal surface to be substantially flat.

12. The method according to claim 1 , further comprising manufacturing the medial side insert from a polyurethane foam.

13. The method according to claim 1 , further comprising manufacturing the lateral side insert from a polyurethane foam.

14. The method according to claim 1 , wherein receiving the numerical data further comprises generating a tridimensional digital representation of the wearer's foot based on a scan of the wearer's foot.

15. A kit for customizing a thermoformable boot, comprising:

a re-usable core dimensioned to generally correspond to a foot size of the thermoformable boot, the re-usable core selected from a group of re-usable cores each corresponding to a different range of standardized foot sizes;

a sacrificial medial side insert manufactured in absence of the selected re-usable core based on a tridimensional shape of a wearer's foot, the sacrificial medial side insert having a medial internal surface and a medial external surface generally conforming to a medial side shape of the wearer's foot; and

a sacrificial lateral side insert manufactured in absence of the selected re-usable core based on the tridimensional shape of the wearer's foot, the sacrificial lateral side insert having a lateral internal surface and a lateral external surface generally conforming to a lateral side shape of the wearer's foot;

wherein the sacrificial medial side insert and the sacrificial lateral side insert are insertable into the boot with the selected re-usable core having a foot size generally corresponding to a foot size of the boot, the medial internal surface and the lateral internal surface abutting outer surfaces of the re-usable core.

16. The kit according to claim 15 , further comprising a sacrificial rear insert manufactured based on the tridimensional shape of the wearer's foot, the sacrificial rear insert having a rear internal surface and a rear external surface generally conforming to a rear shape of the wearer's foot, the sacrificial rear insert insertable along with the sacrificial medial side insert, the sacrificial lateral side insert and the selected re-usable core into the boot, the rear internal surface abutting a rear surface of the selected re-usable core.

17. The kit according to claim 15 , wherein the re-usable core, selected from the group of re-usable cores, is positionable in the boot between the sacrificial medial side insert and the sacrificial lateral side insert and in front of the sacrificial rear insert.

18. The kit according to claim 15 , wherein the outer surfaces and [the] a rear surface of the selected re-usable core are substantially flat, wherein the medial internal surface of the sacrificial medial side insert is substantially flat, wherein the lateral internal surface of the sacrificial lateral side insert is substantially flat, and wherein the rear internal surface of the sacrificial rear insert is substantially flat.

19. The kit according to claim 15 , wherein one or more of the sacrificial medial side insert, the sacrificial lateral side insert, and the sacrificial rear insert is manufactured from polyurethane foam.

20. A method of manufacturing customized inserts for a boot that is at least partially thermoformable, the method comprising:

receiving numerical data corresponding to a tridimensional shape of a wearer's foot for use with the boot;

manufacturing a medial side insert based on the tridimensional shape of the wearer's foot, the medial side insert having a medial internal surface and a medial external surface conforming to a medial side shape of the wearer's foot; and

manufacturing a lateral side insert based on the tridimensional shape of the wearer's foot, the lateral side insert having a lateral internal surface and a lateral external surface conforming to a lateral side shape of the wearer's foot;

wherein the medial side insert and the lateral side insert are shaped to be insertable into the boot with a core dimensioned to generally correspond to a foot size of the boot, the medial internal surface and the lateral internal surface abutting respective outer surfaces of the core; and

wherein the medial side insert and the lateral side insert are configured to be inserted into the boot before inserting the core into the boot.