Your binoculars need to be able to take a hit when you're exercising outdoors. This is why the Olympus 10x25 WP II has a rubber coating. Rain and water don't stand a chance either, thanks to the waterproof construction. Because the binoculars are filled with nitrogen, you won't have any condensation on the inner lenses when the temperature changes. The binoculars have 2 hinges, so you can make them compact for travel or storage. With a weight of just 270 grams, you can easily carry the binoculars around your neck or in a bag.