BARSKA Atlantic 12x50 Waterproof Binocular (Camouflage) O-ring sealed for complete waterproof protection and Dry nitrogen-purged and sealed to prevent fogging and moisture damage in all weather conditions Fully coated optics for increased clarity with BAK-4 prism for crisp images Large knurled center focus knob for precise focusing with non-slip and ergonomic shock absorbing rubber armor Long eye relief with twist-up eyecups Includes carrying case and neckstrap