The famous 5,300 year-old frozen corpse that was recently discovered by hikers in the Alps was remarkably well preserved. Even the clothes and shoes of the prehistoric human had survived well. The shoes were made of leather and were quite sophisticated. They were waterproof and wide, and they were designed for walking across the snow. The ancient human's footwear was made of animal skin on the outside and soft grass on the inside. The grass functioned like a modern sock.