Vivobarefoot's shoes already enhance our feet's natural strength and mobility, and the Primus Lite Knit Shoe takes us even further. With a lighter, more flexible upper, these barefoot shoes keep us primed for controlled training and our active urban adventures. The uppers, laces, and insoles are made with recycled content for close-to-the-earth construction, and the 2mm outsole ensures we're literally nearer to the ground.