My mocs all have a thick rawhide sole that I sew the beaver rawhide to. If you have ever had the pleasure of trying to remove a moccasin that has essentially been nailed to your foot with prickly pair thorns, you would then fully understand the need for double thickness soles. The beaver is to thin on its own but when combined with thicker rawhide, it not only protects the foot, but provides a little extra traction on some surfaces. You lose a little sensitivity to twigs and the like, but it is still far superior to modern foot wear IMHO. Josh