  Fi'zi:k K1 Uomo Shoe - Men's  Bike Builder   Item # FIZ2753  0
5 Item # FIZ2753   Fast just got faster.    To further control
slippage, the K1 Uomo has shaped the heel cup at the aft
position of the shoe. This feature keeps the foot in the perfect
position on hard up-strokes and while climbing out of the
saddle. As a result, you're powering the pedals comfortably and
efficiently. This has been further heightened by Fi'zi:k's
variable stiffness sole construction, called 3D Flex Carbon. The
base is comprised of an ultra-stiff carbon fiber plate, with
second layer being positioned closer to the heel. This layer is
constructed from a material called Tepex that's a little more
malleable than the carbon fiber in order to accommodate and
support multiple heel and arch sizes. Together, the multiple
layers work hand-in-hand with the insole and upper to keep the
heel in place and to maximize comfort. And even better for
triathletes, the outsole has been design to allow a good deal of
lateral flex. So, your feet will