Pentax 62598 9x42 DCF BR Binoculars Open bridge design lessens overall weight while improving handling. Waterproof and nitrogen-filled (JIS Class 6) to handle the most extreme weather conditions (submersible to 1m). Phase coated roof prisms provide high resolution, high contrast images. Full rubber housing protects the binoculars from shock and makes them easier to hold. Fiber-reinforced polycarbonate for strength and rigidity.