The Prio is the best shoe to jump into (and stay in) barefoot running! I speak of marginal gains as barefoot running (properly built up) becomes the most effective form of injury prevention; with the strength in calves, ankles and ligaments etc. being effortlessly maintained from training alone. F**k orthodics man...the worst and most expensive lie I've payed for. The Prio is amasing for running in particular, giving great protection from gravel, twigs and glass while still maintaining the ground feel approaching that of Vivobarefoots! Phenomenal value being $50+ dollars cheaper! If you're thinking of barefoot running or entering the world of barefoot truth, these are the shoe for you