A lightweight, grippy, protective shoe for fast hiking. The men's X ULTRA TREK GTX is a lightweight, speed hiking monster with aggressive traction and complete waterproof protection. It devours trails, helping you move quickly over hard or soft surfaces..Light weight  : Lightweight materials and welded seams make it one of the lightest shoes available, while maintaining flexibility and comfort on the trail. Aggressive Grip  : Aggressive lugs with a reverse chevron pattern help the non-marking Contagrip® sole claw into any surface, for confidence on every hike.   Weather Protection  : Mountains almost always give you unexpected weather. Full GORE-TEX bootie ensures comfort in the harshest weather conditions. Nubuck leather Quality full-grain leather material for longer wear and durability. GORE-TEX keeps your feet dry -from the outside as well as from the inside. Advanced Chassis™ Placed between the outsole and midsole, this lightweight chassis helps optimize motion control, energy management and protection for an efficient, stable yet responsive ride. Chevron lugs Contagrip® TD EnergyCell Advanced Chassis™ Nubuck leather/Water Repellent Mesh and textile lining Gusseted tongue Protective toecap Protective mudguard Molded OrthoLite® Lace locker/Regular laces Standard fit 530.0g (1/2 pair)