These Dual Sided microfibres work wonders on a dirty lens and are available in 2 sizes. The Large comes with 2 Carabiner clips so it can be hung in your pits or staging area for ease of use. The gray side is a plush pile microfibre great for removing mass amounts of paint off a lens, the graphic side is a smooth weave microfibre designed for polishing and removing streaks of oil residue and paint.