Barefoot training shoe for natural movement: The Vivobarefoot Primus Lite IV features a wide toe box, thin sole, and flexible design to support natural foot strength, balance, and mobility Lightweight & breathable mesh upper: Engineered with recycled polyester mesh for superior airflow, comfort, and performance during running, gym workouts, and daily wear Sustainable & eco-friendly materials: Made with high recycled content, including a 98% recycled Ortholite insole and recycled polyester upper, supporting circular footwear innovation Thin Primus outsole for ground feel: Low-profile rubber outsole enhances sensory feedback, grip, and stability for barefoot-style training and cross-training activities Versatile minimalist performance shoe: Ideal for running, cross-training, walking, and active lifestyles—perfect for both beginners and experienced barefoot enthusiasts