Like the roof-prism models, the porro-prism Legend binoculars lock out moisture and soak up abuse with housings that are O-ring sealed, nitrogenpurged and wrapped in rubber armor. The fully multi-coated optics are treated with our permanent, patented Rainguard® coating, so your view stays bright and clear when conditions don’t. The wide-angle porro prisms are crafted of premium BaK-4 glass for stellar edge-to-edge sharpness and detail. So let the Old Mother throw or serve up whatever she wishes. She’ll need a couple aspirin after a day with a Legend.