Pentax 9x32 DCF BC Open Bridge 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.