The only remnants of the leather shoe were its sole and some well ... The nails in the sole provided traction for marching soldiers. Researchers unearthed the ancient military-style footwear ...

The outsole features a combination of replaceable spikes and traction-enhancing lugs ... a carbon fiber plate in the sole that makes the bottom of the shoe more rigid when you swing.

Trail runners require specialized shoes, and Asics is offering a pair with "advanced trail traction" for $40 off right now. Asics is selling Trabuco Terra Trail Running Shoes for only $80.