Set new standards for a true waterproof binocular at an affordable price. Completely o-ring sealed and nitrogen-purged for waterproof, fogproof protection in any season. Features rubber armoring, center focus and fully-coated optics for durability and clarity. Porro prism models are multi-coated for reduced light loss and glare. Field of view 305 feet, 4.2 exit pupil, 17 eye relief, weight 25 oz. Fold down eyecups.