Reinforced with a polymer spine for durability and strength Nylon binding provides a smoother edge, more comfort and a more professional appearance Binding reduces the abrasion from the edge of the belt and the triple lock buckle helps prevent accidental opening or someone stripping your belt Great performance at a great price. Two layers of nylon web are reinforced with a polymer spine for durability and strength. The nylon binding provides a smoother edge, more comfort and a more professional appearance. Plus the binding reduces the abrasion from the edge of the belt and the triple lock buckle helps prevent accidental opening or someone stripping your belt.