Vortex Fog Free Lens Cleaning Kit - Let the best view shine through your optics with a quick cleaning. Vortex brings you this cleaning kit for easy cleaning of binoculars, spotting scopes and other optics...even eyeglasses and sunglasses. Apply the lens cleaner for effective cleaning and anti-fog protection without affecting optical properties. Meets Federal specification NNN-P-40B. Clean off fingerprints and other smudges with the Vor-Tek microfiber cloth.