Sole Thickness: 8 mm = 0.32 inches.
Resolable double leather sole.
If a rubber Vibram sole is added to this sole construction, the thickness of this sole will be 12 mm = 0.48 inches.
The Blake-Rapid construction can be described as a continuation single leather Blake Stitch construction. It adds an outsole, covering the Blake stitches underneath. To properly attach the outsole, Rapid stitching is introduced around the perimeter of the midsole and outsole, producing a welted look.
The first sole is sewn from the inside together with the upper and the insole, while the second sole is joined to the first with a seam outside, obtaining improved isolation from the elements, making it easy to resole and making it sturdier and weatherproof, while enjoying and efficient stitching process.
Resoling is easy as detailing the outsole does not affect the structure of the Blake Stitch underneath.