The Delta Optical Titanium 12x56 models combine classic design with modern technology - used in these are specially coated with multiple layers of antireflection coatings lens with high light transmission. They provide perfectly sharp and high-contrast image.These nitrogen-filled binoculars are also waterproof.Sturdy, rubberized but lightweight and compact design ensures reliability and durability as well as comfort of use for many years to come.12x56 binoculars are recommended especially for experienced users.