The RD Series 10x50mm binoculars boast high quality BAK-4 prisms and fully multi-coated optics to ensure a crisp, bright image. A durable, waterproof and fogproof design ensures a clear view. Its open-bridge design makes it easier for the hand to grip around the barrel and enables it to be more securely carried. Lightweight aluminum alloy chassis wrapped in green rubber armor for grip and impact protection.