Vivobarefoot Primus Flow offers a barefoot-style trainer with an ultra-thin flexible sole and a lightweight synthetic upper, designed for natural foot movement and everyday performance. Key attributes: Black | Synthetic | Ultra-thin, highly flexible outsole for enhanced ground feel | Multi-directional tread for reliable grip and traction | Lightweight construction for unrestricted movement | Breathable upper to help keep feet cool | Minimalist lace-up closure for a secure fit | Wide toe box for natural toe splay | Reflective silver heel strip with 'V' logo for low-light visibility | Textured woven finish on the upper | Subtle embossed hexagonal side graphic | Low-cut ankle collar | Vibrant red Vivobarefoot logo on underside of sole | Dimensions & fit: Wide toe box to allow natural toe splay | Low-stack, barefoot-style fit for close ground feel