Vortex Razor HD 10x42 Binoculars RZB-2102 is a premium pair of binoculars that combines professional-grade optics, user-friendly features, and a tough chassis into a single pair of binoculars. These Vortex binoculars create pristine images, even on hazy days and at long distances, since they're equipped with high density, extra-low dispersion glass that's finished with Vortex's proprietary XR anti-reflective lens coating. The roof prisms of the Vortex Razor-HD 10x42mm HD Lens Binoculars are coated with a dielectric coating for faithful color correction and a phase-correction coating for improved resolution and contrast. The Razor HD binoculars are also highly durable, with a lightweight magnesium chassis coated in non-slip rubber armor. The Vortex Razor HD 10x Roof Prism Binoculars are waterproof, fog proof, and shock proof, with a true open hinge design decreases the binocular's profile and offers superior ergonomics.