Very high quality from $400 to $4,000. One lens - Use as left or right eye goggle or as a monocular. Compact, lightweight, water and dust-resistant. Also suitable for quality night photography. Hermetically sealed enabling use in inclement weather conditions (fog, heavy shower, dusty environment, sand storm etc.). Those with a large eye relief enable glass-wearers to comfortably use without taking off glasses.
These are the real deal, no kidding. Imagine breaking these out while out on the town with friends. Get ready for lots of, "Cool! Can I try?" And for serious users, these are great for night-vision photography.