Bushnell 157050 H2O 7x 50mm Waterproof Binocular w/Accessory Bundle BaK-4 prisms for bright, clear, crisp viewing Multi-coated optics for superior light transmission 100% waterproof: O-ring sealed and nitrogen purged for reliable, fog-free performance Non-slip rubber armor absorbs shock while providing a firm grip Twist-up eyecups