Terra Plana - Boi (Black/Biscut Oil Tumbled Leather) - Men's: Boi was designed with careful ergonomics in mind, and is anatomically correct for the ultimate barefoot experience. Stroebel stitched construction with recycled rubber sole. Canvas, coffee bag or oiled, tumbled leather upper. Front cup sole with sleek heel, natural stepping stone formation shaped lugs. Water based adhesives and also recycled foam footbeds make this style unmistakably Terra Plana.