Ergonomic styling is mated with a rubber-armored exterior, providing a firm grip whether wet or dry. Nitrogen-filled and O-ring sealed for total waterproof, fog-proof and shockproof performance in any environment. Turn-and-slide rubber eyecups, complemented by long eye relief, allow the monocular to be used comfortably by eyeglass wearers. Great for bird watching, travel, sports spectating and nearly any outdoor adventure. Large, central focus wheel and adjustable diopter make focus easy to achieve and maintain, even while wearing gloves. The all-purpose compact monocular have multi-coated lenses and offer waterproof and fog-proof performance. All lenses are coated with multiple layers of anti-reflective compounds for maximum light transmission.