Although this Michael Schumacher limited edition watch retains the iconic design of the Royal Oak Offshore series, the fact is that its case is specially made. The octagonal bezel of this watch is made of Cermet ultra wear-resistant porcelain, which is seven times more durable than steel, and is fixed with eight automotive style circular arch embedded nuts. This watch is also equipped with a uniquely designed rubber strap (titanium and rose gold styles in gray, platinum styles in blue), connected by micro bead polishing and satin matte titanium chain links, designed to mimic the cooling air intake of racing cars. The crown polished by micro beads (made of titanium, rose gold, or platinum) is made into a gear like shape and decorated with a red anodized aluminum clip engraved with the Airbnb logo. The titanium bridge with micro bead polishing treatment can protect the black glossy polished ceramic button, and the top of the button is made of titanium metal, platinum, or rose gold.