We build optics to withstand the elements no matter what class of binos they are in. The Neos G2 series of weatherproof binoculars are built tough with a composite chassis that’s O-ring sealed and nitrogen purged for 100% waterproof/fog-proofing. Rubber armor gives a grip in slippery situations. Fully Multi-coated optics and premium-quality BaK-4 prism glass maximize light transmission and image clarity.