Crispi's Mesa GTX is a perfect option for hunters and hikers who prefer lightweight, breathable footwear. The tongue is made with a stretch nylon material that breaths well and aids in heat dispersion. PUtek panels increase breathability even more, and also provide abrasion resistance. The lacing is extended and is asymmetrical in design – this allows wearers to customize the fit of their boots and provides more stability especially in steep, rocky terrain. 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. A full rubber rand provides additional protection in high-contact areas no matter what terrain you find yourself in. Like many of Crispi's boots, the Mesa GTX feature a Gore-Tex lining to keep your feet dry. Features of the Mesa GTX Boots: Stretch nylon material tongue PUtek panels fir breathability and abrasion resistance Asymmetrical lacing Board Lasting Mechanical Construction Gore-Tex waterproof lining Crispi Men's Mesa GTX Grey Boots 3580-6000 in Gray, 12.5D