Markedly one of the most celebrated Diadora collaborations of all time, the Solebox x Diadora N9000 “Ferro” was released in early January 2015. Priced at roughly $210, the retail mark initially scared away some consumers, but those that saw past the price were greatly rewarded with a unique culmination of materials, craftsmanship, and colorway–not to mention a sound investment. Inspired by the Venetian Gondola, the Ferro N.9000 bolsters a light blue kangaroo leather on the mid-foot contrasted by an overlaying soft grey suedes around the mudguard, quarter and vamp. Continuing with the luxurious materials, the inner sock liners is Alcantara and the toe box is composed of 3M reflective grey mesh. Additionally, the traditional N9000 stitching is not present at the rear panel, but a white midsole does the job of completing the look while a grey outsole that creeps up the sides of the midsole finishes the Solebox Ferros off. Originally only available in-store at Solebox, there was later a worldwide release by a few select Diadora retailers a few months later in April. Still considered to be the epitome of hand-crafted Italian Diadora quality, the Solebox x Diadora N9000 “Ferro” set the mark for using a unique color palette and pinnacle materials.