We build optics to withstand the elements- no matter what class of binos they are in. We figure if you spend any time outdoors you will be near water- and your equipment might spend some time in it. The Neos series of weatherproof binoculars are built tough- with a composite chassis that’s O-ring sealed and nitrogen purged for 100% waterproof/fog-proofing. So- if you run into foul weather or take a spill in a mountain stream- your Neos binos are ready for it. Rubber armor gives you a grip in slippery situations. Fully Multi-coated optics and premium-quality BaK-4 prism glass maximize light transmission and image clarity.