Steiner Navigator Pro 7x50 Binoculars - Magnification 7X - High Contrast Optics - Floating Prism System - Sports-Auto Focus - Delivers Excellent Image Clarity, Navy Blue (7655)N2 INJECTION SYSTEM Seals 14 psi pressurized dry nitrogen inside the optic, for fogproof clarity in any condition from artic cold to desert heat. FLOATING PRISM SYSTEM Uses flexible silicone lens mounts to absorb severe shock, impact and abuse without damage. SPORTS AUTO FOCUS Delivers, once shot, always sharp, briliant 3D images from 20yds to infinity without refocusing, perfect for your active life. MAKROLON HOUSING Durable polycarbonate with NBR