This Sole Runner FX Trainer Sandal is based on the famous FX Trainer styles. The upper is made of leather the 6mm out sole gives a secure feeling on rough surface. Width, length is the same like all FX Trainer styles. The shoe sits snugly on the foot with its elasticated closure and the elastic band across the instep. It doesn't support, it enables you safely walk barefoot as if you were walking on the soles of your feet.