BARSKA Blackhawk 10x42 Waterproof Binocular 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 Optimum long eye relief with twist-up eyecups Ideal for all outdoor activities in all-weather conditions, and includes carrying case and neckstrap