Sporting an ultra-wide field of view, long eye relief, and wide exit pupil—all in a compact magnesium housing—the Swarovski 12x42 NL Pure Binoculars also combines extra-low dispersion (HD) glass elements and a range of proprietary optical coatings to create a set of glasses that delivers impressive image quality and durability. In keeping with its tradition of high-performance optics, Swarovski uses highly reflective roof prisms and fully multicoated fluorite-containing HD glass lenses to deliver superior image quality. A field-flattener lens system complements the glass and coatings to keep the edges of the view crisp and sharp. The resulting views are rich with detail and saturated with lifelike color with exceptional contrast and resolution. In addition to its high-transmission optical system, Swarovski also equips the NL Pure binocular with a range of features that improve the handling experience. A re-engineered bridge and focus system provide smooth movement in a short configuration, so you have more of the optical tubes to grip. Covering the magnesium-alloy housing is Swarovski's iconic rubber armoring that provides impact protection and a positive grip where they are needed most. The housing is nitrogen-filled and O-ring sealed to be waterproof to a depth of 13 feet, and resistant to internal fogging. Additional features like tethered front and rear caps, a soap and brush cleaning kit, carrying case, and neck strap round out the thoughtful details that make the NL Pure stand out.