Only worn inside the gym a few times. Basically brand new Vivobarefoot Primus Lite III Running Shoes Train hard while treading lightly on the planet. The Primus Lite III is our hero trainer and its minimalist design lets your feet move in the most natural way possible. Building strength for every run, walk and workout. Recycled Mesh Upper Lightweight and lean, the Vivobarefoot Primus Lite III offers a less shoe, less weight experience for enhanced speed and freedom to move.