Fully-Multi Coated OpticsAll air-to-glass surfaces feature multiple layers of anti-reflective coating. Fully multi-coated optical systems deliver the brightest, highest-contrast images with the least amount of eye strain because only a very small percentage of light is lost before it reaches the viewer's eye.
RainGuard HDThis patented, permanent, water-repellent coating causes moisture from rain, snow, sleet and condensation to bead up and scatter less light, so you get a clear, bright view when other optics would be rendered useless
Waterproof/FogproofProducts are O-ring sealed and nitrogen purged for total waterproof and fogproof protection. These models can withstand complete immersion in water and stay dry inside. The interior optical surfaces won’t fog due to rapid temperature change or humidity.