This is one jaw-dropping binocular! I have used it in an 18 days sea kayaking expedition. The binocular was soaked by sea water in its case under the sun most of the time. It had been under the water too at one point. After the expedition, it still looks great and function like the day I bought it. There was no moisture inside and the optical adjustments are still working smoothly. You wouldn't be able to find a binocular with this amazing clarity at this price. No kidding, this should be worth $700 each!