100% WATERPROOF/FOGPROOF/SHOCKPROOF PERFORMANCE; ULTRA-RUGGED, RUBBER-ARMORED, ROOF PRISM DESIGN; PHASE-CORRECTION COATED PRISMS FOR INCREDIBLE CLARITY & BRIGHTNESS ; EXTENDED EYE RELIEF & CENTRAL FOCUS FOR VIEWING CONVENIENCE ; FULLY MULTICOATED LENSES FOR BRIGHT, CLEAR IMAGES; PRECISION ALIGNED OPTICS FOR EXTENDED VIEWING; 10 X 42MM