Lowa Men's Ranger III GTX Hiking Boot 100% Leather Imported Rubber sole Goretex durably waterproof/breathable. X Lacing secures the tongue along vertical and horizontal axes, avoids blisters and pressure points We use Polyurethane (PU) for our midsoles. It's a terrific shock absorber, rebounds well, will last longer on the trail and offers better comfort. SPS Dynamic provides support for comfortable long distance walking. TPU inserts within the softer PU midsole helps control and prevent over-pronation and supination Vibram long wearing outsole