Vortex Optics FFLCK-2, Fog Free Lens Cleaning Kit Vortex fog free lens cleaning kit keep views clear This cleaning kit is for easy cleaning of binoculars, spotting scopes and other optics, even eyeglasses and sunglasses. Vor-Tek Microfiber Cloth is safe for all lenses The scientifically-designed microfibers of the Vor-Tek Microfiber Cloth clean off fingerprints and other smudges more effectively than possible with regular cloths. The extra thick, soft microfiber cloth is made for cleaning time after time. Anti-fog Cleaner provides effective anti-fog action up to 7 days