Lake based the construction of its MX331 Shoes around Klite kangaroo leather. And while this might sound too exotic to be durable, quite the opposite is actually true. Lake uses this material for many of its shoes for a good reason. What is it? Well, because it provides the ideal balance between suppleness and strength. Additionally, for a leather, it's also pretty breathable -- an added perk given that these shoes are intended for races that could make your eyeballs sweat. However, to ensure that you don't overheat, Lake strategically placed mesh around the uppers of the MX331. This concept has been furthered at the liner for both the heel and tongue, as Lake incorporated its Outlast temperature-regulating fabric. As a result, your feet will remain at a consistent, comfortable temperature, regardless of whether it's hot or cold out. Moving on to the last of the shoes, we find Lake's CFC Race Last. This last was specifically designed for enhancing power transfer to the pedals. Lake achieved this by purposefully positioning the foot in a manner that directs its energy to the pedal and to the soil. And that leads us to the most exciting features of the MX331: its outsole and tread design. Starting with the former, Lake used its Lake Race carbon fiber sole. Of course, carbon fiber provides the optimal amount of rigidity for power transfer. However, what's interesting about Lake's design is just how much carbon fiber there actually is. The outsole features what Lake refers to as cleat pockets, which house the modular rubber treads. Lastly, to ensure that you experience an ideal, consistent, and powerful fit, the MX331 features the venerable BOA Push/Pull retention system. Advantages of this system include a nearly limitless level of volume customization, a complete lack of pressure points, and around a two-thirds weight drop. On top of this, BOA uses aircraft-grade stainless steel to account for heightened durability. You'll also find that Lake made the heel cup...