The Athlon Optics Neos G2 10x42 HD binoculars were built to harsh weather and poor conditions. The feature O-Ring sealing and are 100% water and fog-proof. The Neos also comes equipped with BaK4 prisms to reflect more light into the users eyes for brighter, sharper images. Features of the Neos G2 10x42 HD Binoculars: BaK4 Prisms Multi-Coated LensesLong Eye Relief (14.1mm) Close focus Twist up EyecupsWaterproof Athlon Neos G2 10x42mm HD Binoculars 116009