Sig Sauer Zulu 9 Close Bridge AK Prisms HDX Glass Binoculars For enhanced ruggedness and durability, this 45 mm Binocular incorporates a magnesium housing surrounding the fully multi-coated abbe-Koenig Prism System Dependable waterproof (ipx-7 rated for complete water immersion up to 1 meter) and fog-proof performance The Zulu9 is tripod-compatible and also includes tethered objective lens covers, a deluxe neck/shoulder strap, lens cloth, and a premium padded Ballistic Nylon case