The Bushnell Elite Binocular is a perfect balance of style and state-of-the-art technology. O-Ring sealed and nitrogen purged for waterproof and fog proof protection in all weather conditions. The Elite contains only the finest optical glass polished to a high resolution finish. Each lens surface is fully multi-coated with anti-reflection materials to reduce light loss. PC-3 phase coating on the roof prism models dramatically improves resolution and contrast by correcting the light phase-shift interference in roof prism binoculars.