Warning: if you upgrade to the Fi'zi:k R1B Uomo Boa Shoe, there's a good chance you'll be so spoiled by the sumptuous uppers and irresistibly second-skin fit that you'll never be able to go back to another shoe. That being said, if you have a penchant for clean, minimal aesthetics and pro-level functionality, you'll have a hard time finding fault with the R1B Uomo. As the top-of-the-line shoe from a brand that prides itself on simplicity over excessive extras, the R1B Uomo relies on fit and high-end materials to become an indispensable part of kit. This year, Fi'zi:k replaced last year's kangaroo leather uppers with its trusted microtex material. If you're a loyal R1B fan, don't worry; the synthetic material has already earned its stripes on Fi'zi:k's extensive line of saddles and other shoes, so rest assured that it's worthy of a shoe of the R1B's caliber. With an asymmetrical cut and dual Boa dials providing limitless potential for fit adjustment, the shoes' one-piece uppers will wrap around your feet in a way not unlike the post-ride burrito you dream about to get you through your last climb of the day. Plus, Fi'zi:k took the time to carve tiny, precise pinpricks throughout the shoes' uppers to let the shoes, and your feet, breathe on hot days. Fi'zi:k didn't stop there either. Other fit details, like an adjustable heel cup for more consistent power transfer and Fi'zi:k's careful Volume Control design work to achieve a nearly custom fit that goes beyond simpler, less precise models. Along the bottom, a uni-directional carbon fiber sole anchors the shoe, promising the kind of snappy power transfer that has earned the R1B Uomo its well-deserved presence in the peloton. Take a closer look at the soles and you'll notice a complex, and meticulous arrangement of vents, capably managing airflow without inhibiting your aerodynamic efficiency.