The invention is an article of footwear incorporating insulation material, such as a low bulk insulation material, to provide warmth in cold weather, yet with the style, agility, and breathability of a typical conventional shoe or boot. Additionally, in a further embodiment, the invention includes t
The invention is an article of footwear incorporating insulation material, such as a low bulk insulation material, to provide warmth in cold weather, yet with the style, agility, and breathability of a typical conventional shoe or boot. Additionally, in a further embodiment, the invention includes these features in a shoe or boot which is also waterproof and breathable. These aspects of the present invention are achieved through a placement, or mapping, of low bulk insulation to maximize the footwear article attributes of warmth, style, agility, and breathability.
대표청구항▼
1. A footwear article comprising an upper region, a toe region comprising a toe top region and toe bottom region, and a foot bottom region, wherein said footwear article has a footwear thermal resistance Rf of said upper region of 0.18 m2° C./W or less;a low bulk insulation with a thermal conductivi
1. A footwear article comprising an upper region, a toe region comprising a toe top region and toe bottom region, and a foot bottom region, wherein said footwear article has a footwear thermal resistance Rf of said upper region of 0.18 m2° C./W or less;a low bulk insulation with a thermal conductivity of 30 mW/m° C. or less in said toe top region; andhas a footwear thermal resistance ratio of said toe region to said foot bottom region of 0.80 or greater. 2. The footwear article of claim 1, wherein said footwear thermal resistance Rf of said upper region is 0.16 m2° C./W or less. 3. The footwear article of claim 1, wherein said footwear thermal resistance Rf of said upper region is 0.1 m2° C./W or less. 4. The footwear article of claim 1, wherein said footwear thermal resistance ratio of said toe region to said foot bottom region is 1.0 or greater. 5. The footwear article of claim 1, wherein said footwear article is waterproof. 6. The footwear article of claim 1, wherein at least a portion of the upper region is covered by a material. 7. The footwear article of claim 1, wherein said footwear article has a footwear evaporative resistance of said upper region is 250 m2·Pa/W or less. 8. The footwear article of claim 1, wherein said footwear article has a footwear evaporative resistance of said upper region is 100 m2·Pa/W or less. 9. The footwear article of claim 1, wherein said low bulk insulation comprises an aerogel containing material. 10. The footwear article of claim 1, wherein said low bulk insulation has a thickness of less than or equal to 5 mm. 11. The footwear article of claim 1, wherein said low bulk insulation has a compression resistant value of less than 40% strain at a stress of 300 kPa. 12. The footwear article of claim 1, wherein said low bulk insulation has a compression resistant value of less than 55% strain at a stress of 2000 kPa. 13. The footwear article of claim 1, wherein said low bulk insulation is gas permeable. 14. The footwear article of claim 1, wherein said footwear thermal resistance ratio of said toe region to said foot bottom region is 1.0 or greater. 15. A low bulk footwear article comprising a toe top region and an upper region, wherein said footwear article has a footwear thermal resistance Rf of said upper region of 0.18 m2° C./W or less;a low bulk insulation with a thermal conductivity of 30 mW/m° C. or less in said toe top region; andhas a footwear thermal resistance ratio of said toe top region to said upper region of 1.0 or greater. 16. The footwear article of claim 15, wherein said footwear thermal resistance Rf of said upper region is 0.16 m2° C./W or less. 17. The footwear article of claim 15, wherein said footwear thermal resistance Rf of said upper region is 0.1 m2° C./W or less. 18. The footwear article of claim 15, wherein said footwear thermal resistance ratio of said toe region to said foot bottom region is 1.4 or greater. 19. The footwear article of claim 15, wherein said footwear article is waterproof. 20. The footwear article of claim 15, wherein said footwear article has a footwear evaporative resistance of said upper region is 250 m2·Pa/W or less. 21. The footwear article of claim 15, wherein said footwear article has a footwear evaporative resistance of said upper region is 100 m2·Pa/W or less. 22. The footwear article of claim 15, wherein said low bulk insulation comprises an aerogel containing material. 23. The footwear article of claim 15, wherein said low bulk insulation has a thickness of less than or equal to 5 mm. 24. The footwear article of claim 15, wherein said low bulk insulation has a compression resistance value of less than 40% strain at a stress of 300 kPa. 25. The footwear article of claim 15, wherein said low bulk insulation has a compression resistance value of less than 55% strain at a stress of 2000 kPa. 26. The footwear article of claim 15, wherein said low bulk insulation is gas permeable. 27. A footwear article comprising a toe top region and an upper region, wherein said footwear article incorporates low bulk insulation with a thermal conductivity of 30 mW/m° C. or less in said toe top region; andwherein said footwear article has a footwear evaporative resistance of said upper region of 150 m2·Pa/W or less. 28. The footwear article of claim 27, wherein said footwear evaporative resistance of said upper region is 100 m2·Pa/W or less. 29. The footwear article of claim 27, wherein said footwear article has a footwear thermal resistance Rf of said upper region of 0.18 m2° C./W or less. 30. The footwear article of claim 27, wherein said footwear article has a footwear thermal resistance Rf of said upper region of 0.1 m2° C./W or less.
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