The KSO Evo shrinks the margin between being barefoot and being shod by splendid proportions, living up up flawlessly to the title of a Barefoot Shoe. With it's 3 millimetre (1/8th inch) sole, you will feel the ground with surgical precision while remaining protected from the world around you. The upper is made of polyester and PU film, retaining proper protection from scrapes and abrasions while providing unabashed flexibility.