The rubber Blake-Rapid construction replaces the 4 mm leather outsole with an 6 millimeter Vibram rubber outsole that is stitched to the midsole, so that it can easily be resoled in the future without damaging the upper.
The Blake-Rapid construction can be described as a continuation of the 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 weatherproof. Resoling is easy as detailing the outsole does not affect the structure of the stitching underneath.