Bushnell 8 x 25 mm h2o WATERPROOF BINOCULARS The H20T series binoculars are O-ring sealed and nitrogen purged to completely lock out moisture should you spill, take one overboard, or simply run into foul weather along the way. Rubber armoring with textured pads gives you a grip in slippery situations. Multi-coated optics and premiumquality BaK-4 prism glass maximize light transmission and image clarity. You'll quickly see how a little planning on our part goes a long way to magnify your adventures on and around the water. Features 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 Fold-down or twist-up eyecups Large center focus knob for easy, precise adjustments Longer eye relief