Bushnell H2O Waterproof/Fogproof Compact Roof Prism Binocular, Camo, 10 x 25-mm Roof prism binoculars Compact & foldable Textured grip Waterproof & fog proof BaK-4 prism 100% waterproof, O-ring sealed and nitrogen purged for reliable, fog-free performance BaK-4 prisms and multi-coated optics offer crisp clear images with improved light transmission Non-slip rubber armor and Soft Texture Grip absorbs shock and provides a firm grip 10x magnification and 25mm objective diameter; 15-foot close focus distance; 12mm eye relief Large center-focus knob for easy adjustments; Twist-up eyecups; Limited lifetime warranty