VivoBarefoot Primus Trail FG 3.5 Mens barefoot shoes are designed to reconnect you with nature while offering a lightweight, durable, and flexible experience. These trail-running trainers are crafted for those who thrive on rugged terrains, providing the freedom to move naturally and the toughness to handle rocky paths. Made with recycled, vegan materials, they represent a significant step towards sustainable, circular footwear. Firm Ground Outsole provides excellent grip and durability on various terrains Ortholite Insole made from 98% recycled polyurethane foam reduces waste Breathable mesh ensures lightweight comfort and ventilation Constructed with high-performance, recycled materials for eco-friendly wear Designed for trail running and adventuring in natural environments Technical Features Sole base: 3 mm Tread depth: 2,5 mm Weight 281 g (size EU 42) / shoe Materials Vamp, lining mesh  and laces: 100% recycled polyester mesh Overlay: 95% recycled polyester, 5% recycled elastane Mi