Bushnell 132105 H2O 12 x 25mm: * Bak-4 Prisms for bright, clear, crisp viewing * Multi-coated optics for superior light transmission * 100 percent waterproof * O-rain sealed and nitrogen purged * Fog-free * Non-slip rubber armor absorbs shock while providing a firm grip * Twist-up eye cups * Large center-focus knob for easy adjustments * Longer eye relief