Men. X ULTRA TREK GTX. L40463000. Men’s Leather Hiking Boots. 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.