Vanguard Spirit Plus 8x42mm Binoculars 338581 combine BaK4 roof prisms with superior hardware and advanced technology. These Vanguard binocular utilizes P2 phase coating and an emerald lens coating to offer stellar color contrast and light transmission for a high-clarity image. Vanguard Spirit Plus 8x BaK4 Roof Prism Binoculars are equipped to handle the worst snow, rain, and fog that Mother Nature can throw at you, since these Vanguard Spirit Plus binoculars are completely waterproof. Fully multi-coated lenses on these binoculars provide bright, crisp viewing with high contrast images and faithful colors. Vanguard has built a lot of comfort into the Spirit Plus, with up to 19mm of eye relief and an ergonomic grip, complete with a thumb rest to give you a firm hold on the binocular. See true-to-life images from far, far away with the Vanguard Spirit+ 8x42 Waterproof Binocular.