Simpson Boot - TanOur Simpson Boots are made from full grain leather with a unique two tone finish. Crafted with the Enduras reliable upper and the hiking sole of our Mulga, these hybrids will be walking out the door. Slip resistant sole Soles engineered to reduce the risk of slipping on wet or dry surfaces. Leather lined Cow, pig or sheep skin used as lining material will breathe and conform to the shape of your feet over time.