Nikon Monarch X 8.5x45 Binoculars Dielectric High-Reflective Multilayer Prism Coating, Extraordinary technology delivers uncompromised low-light performance Fully Multicoated Lenses & Phase-Correction Coated Prisms, Multiple layers of anti-reflective compounds on every glass surface for bright, vivid sight pictures Durable and Protective, Rubber-Armored Coating, Provides excellent non-slip grip Waterproof/Fogproof, Nitrogen filled and O-ring sealed Enlarged Central Focus Knob, New, larger size provides incredibly quick focus