Athlon Neos G2 10x42 HD Binoculars are built to withstand the elements. The Neos G2 10x42 HD Binoculars fro Athlon are built tough with a weatherproof composite chassis that is O-ring sealed and nitrogen purged. Rubber armor coating gives you grip, when the elements get wet. Athlon Neos G2 10x42 HD Binoculars feature fully multi-coated optics and premium-quality BaK-4 prism glass to maximize light transmission and image clarity. Features: Power: 10 x Field of View: 309 ft Weight: 21 oz BaK4 prisms Bak-4 glass prisms reflect more light to your eyes which will give you brighter and sharper image. Multi Coated Multicoated optics effectively reduces reflected light and increases the transmission of light giving you a brighter image than normal single coated lenses Long Eye Relief Long eye relief can be particularly important for eyeglass wearers because longer eye relief allows them to still see the entire field of view. Close Focus Close focus is important for those who are nature observers and especially important if you are going to watch butterflies or insects Twist Up Eyecups Twist up eyecups with intermediate stops allow you to set the eyecups to the ideal eye relief for you eyes Waterproof Waterproof to protect the binocular in the harshest weather conditions or if accidentally submerged underwater