The Norwex Optic Cloth is a small detailing cloth made of an extremely fine microfiber that feels silky to the touch. Use the Optic Cloth for a shining clean surface on things like eyeglasses, sunglasses, camera lenses, binoculars, computer screens, CD's, DVD's, telescopes and aircraft instrument panels. GREAT for your handheld Gameboy or Nintendo games! To take care of your optic cloth: When it needs to be cleaned, it can be washed and dried in your machines using any laundry soap. Dry your optic cloth with low-lint items (eg sheets), because the microfiber will grab lint off other things in your dryer if it gets a chance! Do not use fabric softener or bleach. Bleach degrades the microfiber, and fabric softener coats the fibers and wrecks their grabbing power (Norwex dryer balls let you dry your laundry faster and without static - no fabric softener required!). Colour: Green. Norwex stands behind their cloths with a 2 Year "proper use and care" Warranty. Norwex also offers a 60 day Satisfaction Guarantee.