These Prostaff 7S binoculars by Nikon are designed for bird-watching and wildlife observation, and is comfortable to use for long periods of time. It features an exclusively-designed optical system which delivers sharp images in excellent quality. Key Benefits: Waterproof up to 1m for up to 10m. Fog-free with nitrogen gas. Features multilayer coated lenses and prisms to deliver images of excellent quality. Attention to detail and features such as the knurling on the focusing ring make the binoculars easy to use and adjust. Mirror-coated prisms with high reflection for enhanced brightness. Phase correction coated roof prism give high resolution. All lenses and prisms are made with eco-glass optics which are free of lead and arsenic. The long eye-relief design provides a clear field of vision, even for those who wear glasses. Turn-and-slide rubber eyecups with multi-click adjustments make positioning the eyes easy. The extremely lightweight design is easy to transport and comfortable to wear. Encased in a rubber armouring for shock resistance and a secure, comfortable grip.