Fusing top-end optical performance with Nikon ATB ruggedness. This binocular can tackle the most extreme conditions, with a full-sized view in a compact size. Waterproof and fogproof. Roof prism design. Bright, multicoated Optics, turn and slide rubber eyecups, rubber armored body, long eye relief- great for eyeglass wearers, internal focus system. Features Lead and Arsenic Free ECO GLASS.