Sans the hard midsole, the combination of a microfiber upper and a rubber sole makes this shoe super light and soft. You will enjoy a climbing sensation that is almost like going barefoot. The minimalist design of the Sensa offers a maximum sensitivity. A polyurethane welded strip on the toe box provides for stability and precise footwork. The elastic band with a stretchy mesh layer guarantees a secure fit, as well as durability. In addition, the 100% synthetic microfiber upper won't stretch out like other slippers, and this shoe is even vegan friendly. ?? Polyurethane welded strip on toe box. ?? Super sticky, 100% butyl Butora rubber sole ?? Double full tabs on the heel with a thumb pinch tab on the front for an easy on and off.