Red Dot Running Company Vivobarefoot Primus Sport III Indigo VivoBarefoot Primus Sport III infant shoe Deporvillage Toddler Primus Sport III Twilight Mauve Vivobarefoot PRIMUS SPORT III PRESCHOOL OBSIDIAN VIVOBAREFOOT Superge Primus Sport III Toddler Tomato Solemio. Strong feet for strong willed kids. The Primus III is an ultra lightweight barefoot kids' trainer. Now extra easy to pull on and off. CONNECTING FEET, BODIES AND BRAINS TO THE PLANET Minimal interference in natural, healthy movement. The ideal introduction to wild your kids feet. The ultra thin, puncture resistant sole means they don't mold around one kid's feet, so footwear can be safely passed on and re loved.