While some shoe makers view comfort as an afterthought to rigidity, the Fi'zi:k R3 Donna Shoes strike the balance between them. This doesn't mean that the R3 forgoes a carbon fiber outsole or stiff upper, not even close. Instead, Fi'zi:k studied how to integrate each portion of the R3 in order for them to work cohesively. As a result, you get a shoe that operates as a dynamic system, not a long independent string of features. The R3 Donna features two hook and loop straps along with an aluminum, ratcheting buckle. This system allows you to fully tune the fit and volume of the shoes both pre ride and on the fly. The bottom two straps control the snugness of the fit at the metatarsal and instep areas. These straps are best adjusted before you hit the road and left alone thereafter. The ratcheting strap is what dictates the entry and exit adjustments. The loading lever is made from aluminum that's been mated to a stainless steel base. It has a double click adjustment capability with a full release mechanism at the base of the lever. Together, the three strap system eliminates any internal foot slippage that depreciates your efficiency. To evenly distribute pressure across the top of the foot, Fi'zi:k made the strap dimensions wide. The strap design allows you to easily lengthen or shorten the strap in order to precisely dial in the volume of the shoe. Also, each strap has been crafted from fully adjustable length sail cloth in order to bolster durability while maintaining a low overall weight. For an extreme control over volume, or simply to efficiently clean the inside of the shoe, Fi'zi:k designed the tongue pad to be fully removable. To further control slippage, the R3 Donna 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 a variable stiffnes...