Merrell Women's Siren Waterproof Mid Hiking Boot 100% Nubuck, Suede Imported Vibram sole Shaft measures approximately 4" from arch Strobel construction offers flexibility and comfort Breathable mesh lining with anti-odor Aegis treatment Ortholite anatomical footbed Women's specific stride-sequenced QForm cushioning Shock-absorbing air cushion heel Vibram traction sole