Columbia Men's Grizztooth XTM Omni-Tech Hiking Shoe 100% Mesh and synthetic Features Omni-Tech waterproof, breathable membrane provides a dry, comfortable environment Gusseted tongue keeps debris and moisture out Rubberized print toe/heel overlay provides lightweight abrasion protection Contour comfort 2D footbed with AgION anti-odor treatment Non-marking Omni-Grip rubber compound for rugged trail traction and durability