Features of the La Sportiva Women's Aequilibrium LT GTX Boot Lightweight 3-Season mountain boot with Leather Upper and a Gore-Tex waterproof breathable lining Features the new Double Heel construction and Highly cushioned Midsole/Outsole package Gore-Tex Performance comfort ensures waterproofness, breathability and all-day comfort Enhanced 3D flex EVO system Highly-abrasion resistant and medial/lateral blow pu-Tech light mud guard Double heel increases downhill breaking and promotes fluid strides reducing muscle fatigue Semi-automatic crampon compatible Low Density PU inserts deliver High-cushion and allow sole/Midsole deformation around terrain Features to improve traction and grip Vibram mont rubber compound Outsole and thin rubber layer wraps the side wall Integrated tongue Lace locks differentiate the tension between Upper and lower lacing Nubuck leather Upper Hidden lacing compartment on vamp protects laces Molded external TPU heel and toe caps Innovative system Uses a multi-directional Upper hinge that allows the ankle to take advantage of its natural characteristics Total freedom of movement of the ankle allows using the boots flex while rocking and transforming it into pure power during the pushing phase Impact Brake System soles also offer superior grip on very steep terrain increase traction by 20% due to the sculpted heel brake, off set lugs and the synergy with the asymmetric axis of the foot Enhanced braking effect Enhanced shock absorption Reduced articultaion fatigue Vibram is the world leader in High Performance rubber soles Highest quality and maximum protection even in the most extreme weather Gore-Tex guaranteed to keep you dry Upper: Nubuck Leather, PU-Tech Light Mudguard, Lace Locks, Synthetic Integrated Tongue with Hidden Lacing, TPU Heel and Toe Caps Lining: Gore-Tex Performance Comfort Insole: Hybrid Carbon-Nylon Weave Midsole: High-Cushion PU Inserts, Rubber Guard Side Wall, TPU Insert For Rear Crampon Attachment Sole: Vibram Mont Rubber Compound with Impact Brake System