Fully waterproof and fogproof; The durable aluminum housing is shrouded in a rubber armor coating that provides a positive grasp; BAK4 prism delivers a perfectly round exit pupil with virtually no edge distortion; Fully multi-coated lenses for maximum clarity, contrast, and color fidelity; Inverted Porro prism design for light weight and compact body; Twist-up eyecups and generous eye relief; Close focus distance: 10 feet; Smooth focusing; Product code: 59225