For the last 40 years, the Nevada GTX have been a staple in Crispi's line of premium boots. To provide excellent stability on steep terrain, the Nevada GTX feature Crispi's own A. B.S. S. (Ankle Bone Support System). Designed over the course of several years, the A. B.S. S. provides comfort and protection to the entire ankle area thanks to a combination of innovative materials to allow the footwear to contour gently your ankle. The Board Lasting Mechanical Construction achieves the perfect connection between torsion rigidity and flexibility thanks to a mechanical process that wraps the comfortable and soft part of the upper to the insole frame. To promote greater comfort, the Nevada GTX features the Crispi Crossbow Frame (C. C.F.). This innovative midsole functions similar to a crossbow (hence the name) and follows a particular form in a waving module which offers a perfect stability, sustaining the foot and, at the same time, absorbing the shocks during the walk. Additionally, the Nevada GTX features a Vibram outsole for excellent traction across a wide range of terrain. Features of the Nevada GTX: A. B.S. S. (Ankle Bone Support System)Board Lasting Mechanical ConstructionCrispi Crossbow Frame (C. C.F.)Vibram outsole Crispi Men's Nevada Non-Insulated GTX Boots 5860-4203 in Brown, 10.5D