Lowa Women's Albula LL Hiking Boot 100% Leather Vibram sole Shaft measures approximately 6" from arch Heel measures approximately 1 1/2" Platform measures approximately 1" Lowa Control System manages moisture to keep feet dry and help eliminate blisters and hot spots C4 Tongue is anatomically-contoured for a natural flex that cradles the foot in comfort and provides a faster break-in time X-Lacing with tongue stud allows for better pressure distribution SPS System helps to control over-pronation and supination, reducing fatigue and potential injury when covering long distances PU inserts within the softer PU midsole mold we are able to control and offer prevent over-pronation and supination provides torsional support underfoot