The Vivobarefoot Primus Trail II FG L trainer has a speed-inspired design that will give you performance. This shoe offers a lightweight package that will give your feet support and stability on your trainings or daily exercise routines. Premium textile upper for durability. Breathable textile microfibre lining for abrasion-free wear. Textile lined insole for cushioning and support. Low-top construction for ankle mobility. Durable, lightweight synthetic sole for grip and traction.