The Optisan BRITEC PM Binoculars are the latest innovation from Optisan optics for serious marine and boating users. Inheriting all the optical features from the classic WATERSPORT model, the improved twist-up FC (fully-covered) winged eyecup help avoid the ocean glare from both right and left enhancing brighter and more comfortable observation. Highlight features are: Twist-up FC winged eyecup Large eyepieces for comfort view Fully Multi-coated Green Optics w/- High index BaK4 prism IPX7 Waterproof Rugged Swissamotec 98™ body construction Two-Piece British Navy Neoprene pouch included