There are lots of Ergonomic Engineering in this shoo. Perfect FIT with an ergonomic hand made construction that no needs back counter on heelcup to fully adjust to the foot. The heel, developed by rummos, is a high density special rubber that acts as responsive cushioning and increase the comfort. All standard dancers deserve and must have a dance shoes like this. Available in Black Italian Vernice, Black Leather and Grey Nubuck Leather. .