PROSTAFF P3 binoculars incorporate superior Nikon optics and lens coatings for a high-quality viewing experience; Nikon's multilayer lens coatings cut glare and reflection for sharper, clearer views; A highly reflective silver-alloy coating is applied on the mirror surfaces of the prism so more of the visible spectrum reaches your eyes; Although they're not intended for underwater use, the PROSTAFF P3 binoculars can safely be used around splashing water or in inclement weather; The glass used in PROSTAFF P3 binoculars is lead-free and arsenic-free; The PROSTAFF P3 is filled with bone-dry nitrogen gas, so even going from a warm car to the cold winter air won't fog the lenses; 15.4mm of eye relief ensures everyone can find a clear, comfortable viewing position, with or without eyeglasses; The dark green rubber-armored body provides non-slip grip and protection from the occasional drop or bump; The lightweight body of the PROSTAFF P3 binoculars features strong fiberglass-reinforced polycarbonate resin