Special but not exclusive waterproof breathable footwear of safety type etc.

Abstract

A waterproof and vapor-permeable shoe, including: an upper assembly, which is composed of at least one upper and a waterproof and vapor-permeable functional layer internal thereto, a tread portion joined to the upper assembly below the upper assembly, at least one vapor permeation layer provided below the foot insertion space formed inside the shoe. At least one opening is provided lateral with respect to the shoe proximate to a region of connection of the upper assembly to the tread portion, the at least one opening being open toward a perimetric edge of the at least one vapor permeation layer. The shoe further includes, interposed between the perimetric edge and the at least one opening, selectively: at least one waterproof and vapor-permeable functional element, at least one functional portion of the functional layer.

Description

technical field [0001] The invention relates to a waterproof and breathable (steam) shoe. [0002] Such shoes are particularly but not exclusively of the safety type and the like. Background technique [0003] It is well known that for comfort a correct exchange of heat and water vapor between the microclimate inside the shoe and the outside environment must be ensured. [0004] In the field of producing waterproof footwear, it is considered highly desirable to confirm that the structure of the footwear is more efficient and reliable in allowing heat exchange and breathability, while ensuring that it is impermeable to liquid water. [0005] Specifically, the main waterproof and breathable shoes currently on the market are adapted to allow water vapor to pass through the upper and sole. [0006] Regarding the upper, shoes on the market have a lining made of a breathable material impermeable to liquid water. [0007] Some models of shoes are known in which part of the upper...

AI Technical Summary

Problems solved by technology

[0022] Although water penetration into the sock-like liner is avoided, this construction has the disadvantages that water may seep through the lateral openings of the upper and soak into the air-permeable layer and the combined insole provided outside the sock-like liner and any other optional fill layer

[0028] In addition, shoe materials penetrated by water ingress between the waterproof liner and the sole layer will remain wet for a long time, dry slowly, and therefore deteriorate rapidly

[0029] In addition, without proper protection, sewage and dust will block the openings of the upper and the breathable layer, which will inevitably hinder the breathable function of the shoe

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