The long spikes allow the wearer to walk into the concrete mix and stay above and out of the overlay itself (except for the spikes) as they apply and disperse the concrete that will be smoothed later. All of the spike holes are removed with a trowel or smoother after it has been applied and dispersed. Built in shoe catcher helps hold any size shoe or boot in place so one size will fit all, with no straps, laces or buckles needed.