LIGHTWEIGHT performance and comfortBAREFOOT-Inspired FeelTrue rubber soleThe lightweight, flexible performance shoe for road running, trail running, fitness, CrossFit, hiking, and more…Foot-first design. Wide toe boxes let your toes spread and relax. Zero-drop, non-elevated sole for proper postureLow-to-the-ground for balance and agility. The flexible sole lets your feet bend and move naturally.FeelTrue sole gives you great traction, protection, and the stimulation and feedback your feet and brain want.IMPORTANT SIZING NOTE: As of August 20, 2019 the Prio was resized to fit true to size. We recommend ordering your typical shoe size. Of course, if this isn’t correct, you can exchange it for the right size.