The body is made of durable carbon fiber and glass-reinforced polycarbonate resin. This is all in addition to the rubber armoring that is standard on most Nikon binoculars. The phase-correction coated roof prisms offer high-resolution watching, and the multi-layer coated lenses and prisms make the images bright. The small 3m close focus distance ensures that you will get a clear image at a variety of distances. Like many of Nikon's high-end binocular offerings, the Monarch X 10.5x45 binoculars are made with Eco-Glass, which means that they contain no lead or arsenic.