Elaborately multi-coated lenses provide an excellent viewing experience with razor-sharp and crystal-clear images. All lenses and prisms are made from special Nikon Eco-Glass, produced without arsenic and lead. The carbon fiber-reinforced fiberglass construction is extremely durable, waterproof, and fog-free. The rubber armor enhances shock resistance and supports a comfortable grip. The rubber eyecups are precisely adjustable to the eye in several click-stop positions. With a large eye relief, even eyeglass wearers can enjoy a wide and clear field of view.