Vivobarefoot Opanka Leather Men's Slip-On ShoesThe Opanka from Vivobarefoot have a simple minimalist construction to give you freedom and allow your feet to move as naturally as possible. Designed to allow you to experience barefoot like walking, these slip ons will be your perfect companion for all your summer adventures. Premium durable leather upper. Soft and breathable leather lining. Non removable, leather lined footbed for support. Ultra thin, flexible and foldable. Patented, ultra thin,