Clean the lenses with a microfiber cloth and a drop of mild soap in lukewarm water — never paper towels or clothing, which can scratch the coating.
Store your sunglasses in a hard case when not in use to protect the frame and lenses, and use both hands to put them on and take them off so the frames don't bend or loosen.
Keep them out of prolonged direct heat — a hot car dashboard can warp frames and damage lens coatings.
