The Nature Series takes you to an even higher performance level. Significant features include fully multi-coated optics and high definition views. These binoculars feature state-of-the-art design with a modern open frame style. Fully multi-coated optics and high precision BAK-4 prisms enhance the optical quality with maximum contrast and color rendition. The rugged aluminum main body has a rubber covering for additional protection for the optics. Twist up eyecups provide easy adjustment for your eyes. The Nature series is waterproof & fogproof with nitrogen filled gas for added protection when out in damp environments.