From Twisted X®, the Men's Driving CellStretch Chukka Moccasins feature: Full grain leather upper  Removable, moisture-wicking, antibacterial and machine washable SD footbed Compression molded EVA midsole integrated with Twisted X’s patented CellStretch® comfort technology and a nylon/glass fiber shank provide long-lasting comfort, stability and durability Slip resistant molded rubber outsole Imported.