OUR HERO TRAINER: Train hard while treading lightly on the planet. The Primus Lite Knit 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 Knit offers comfort and flexibility SUSTAINABLE: Remade with more sustainable materials that have reduced the impact this footwear has on the planet ACTIVE THIN SOLE: offers the most sensory underfoot barefoot experience, providing ultimate nonslip grip and durability on hard surfaces in urban environments Train hard while treading lightly on the planet. The Primus Lite Knit 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.