Vivobarefoot Primus Sport IV Toddlers'The Primus III is for kids who already know their own minds and feet. So keep them grounded, but set them free. The updated Primus III has the same ultra lightweight design and flexible, grippy sole of our bestselling barefoot kids' trainer, made using recycled, animal free materials. Now engineered with a new tongue construction for a wider opening, letting kids pull these everyday sneakers on and off by themselves. With a toggle fastening for a