Safe to Use on ALL Lenses Flexible Cleaning Tip Non-Liquid Cleaning Compound Will NOT Spill or Dry Out Reduces Static Build-Up Fits Easily into ANY Pocket or Bag The retractable brush, made of soft, natural bristles, is used to dust away any hard particles. The unique tip which holds the special LensPen cleaning compound flexes, matching the contours of the lens. By applying gentle pressure on the lens and using smooth circular motions, any smudges will be removed instantly with LensPen. Besides protecting the tip, the special LensPen cap replenishes the tip with cleaning compound each time it is replaced and twisted a half turn. Is Lenspen environmentally friendly? Yes! LensPen requires no solvents and, unlike lens tissues, creates no waste.