The strongest Pivotal seat on the market, the OZ seat is a superb reflection of minimalism in pivotal seat design. The concept, in the beginning, was to sink the pivotal ratchet deeper into the seat base to give a cleaner look from the side. We also took the opportunity to optimize the support webs inside the molding to make the seat formidably stronger. We recently re-designed the foam padding on our Fat version, to give it a more refined and smooth shape. There are a lot of pivotal seats out there, but nothing comes close to the OZ.