Shimano DynalastShimano Dynalast is a sole construction with less toe elevation that promotes smoother, more energy-efficient upward movement when pedalling. The advantages are higher performance, less fatigue and more comfort for every type of rider. Shimano Dynalast also features a lighter and thinner sole structure and a larger cleat adjustment range.BOABOA closures offer millimetre-precise fine adjustment for a perfect fit. Lightning fast, one-hand adjustment, secure lock and quick release. They repel mud and water and are extremely light.