The Primus Lite III is Vivobarefoot hero trainer and its minimalist design lets your feet move in the most natural way possible. Building strength for every run, walk and workout.The Primus Lite III made for moving naturally and growing strong through wide-ranging training disciplines. Its perfect for experienced barefoot cross-trainers and those new to barefoot performance. More Details FREE TO FEEL AND MOVE Natural Foot shaped (wide toe box), to let your feet do their natural thing. WIDE to allow for natural stability THIN to enable you to feel more FLEXIBLE to enable natural movement. (Re)new and improved- remade with recycled materials that have reduced this impact this footwear has on the planet. Lightweight and versatile, whether you're working in or working out, keep your natural connection. Vegan/Animal Free Made in Vietnam Active Outsole The Active Sole offers the most sensory underfoot experience, providing ultimate grip and durability on hard surfaces in urban environments. The signature 4mm thin sole puts the minimum material between your feet and the ground. Recycled Materials Made from recycled materials, reusing post-consumer plastic waste, helping to reduce our waste to landfill. Wide, Thin and Flexible WIDE to allow for healthy foot spread and natural stability, THIN to enable you to feel more and move skillfully, and FLEXIBLE to build foot strength enable natural movement. (Re)New and Improved Less material sources, better materials and more sustainable materials have reduced the impact this footwear has on the planet, whilst keeping all of the feeling. Materials & Transparency Upper Vamp, Quarter, Tongue (100% RPET) Overlays (40% Polyester, 60% Polyeurathane) Linning Collar and Tongue Lining (60% RPET, 40% Polyeurathene Microfibre) Laces 100% RPET Outsole 100% Synthetic Rubber