An excellent value, the REI XR 10 x 50 binoculars are compact and lightweight enough to go just about anywhere and deliver outstanding imaging. Fully multicoated lenses using anti-reflective coatings provide superb light transmission, even in low light. BaK4 prisms match the optical system to enhance image quality, brightness and resolution to discern fine detail at long distances. Roof-prism style is less bulky and more compact than traditional or porro prism styles, making it much easier to hold and carry. Long eye relief enhances viewing comfort by reducing eye strain regardless of whether user is wearing eyeglasses or not. Twist up/down eyecups make it easy for eyeglass wearers to enjoy a full field of view. Shockproof, rubberized aluminum body construction for rugged use in the field water- and fog-proof thanks to sealed O-rings and nitrogen filling. Excellent close focus ability allows user to enjoy a sharp view of images at a short distance. Includes carry case, neck strap, lens cleaning cloth and instructions for usage. Great for bird watching, travel, sports spectating and nearly any outdoor adventure.