OUR HERO TRAINER: Train hard while treading lightly on the planet; The Primus Lite III is our hero trainer and its minimalist barefoot design, and flat zero-drop sole, lets your feet move in the most natural way possible BUILD STRENGTH: for every run, walk, gym, and workout session, Primus Lite III offers comfort and flexibility SUSTAINABLE: Remade with more sustainable materials that have reduced the impact this footwear has on the planet Soft and breathable textile lining