Made with the mariner in mind, our Tradewind Marine Binoculars scan the horizon with 10x magnification and large 42mm objective lenses for super-bright, clear images. Each side of the BaK-4 prism glass has multiple antireflective coatings to increase light transmission the more light you preserve, the brighter the image. Strong aluminum-alloy body with durable rubber armoring absorbs rough handling for years of high-quality magnification. The O-ring-sealed binoculars have a IPX7 waterproof rating (30 minutes in depths up to 1 meter) and are nitrogen-filled to prevent fog and condensation on the lenses. Includes premium lens cloth, padded floating neck strap, soft case and lens covers. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Full-Size.