The Kaenon Cleaning Bag comes with every pair of Kaenon sunglasses. This dual purpose micro-fiber cleaning bag for your premium Kaenon eyewear. We use only the finest micro-fiber cloth for this cleaning cloth / soft case. Because abrasive materials such as t-shirts or paper products can scratch sunglass lenses, we recommend that you use this special micro-fiber cloth to clean your revolutionary Kaenon SR-91 lenses.