Orion 5833 Microfiber Optics Cleaning Cloth Handy and useful OptiCloth for wiping off fingerprints, smudges, or dust from optical surfaces Advanced microfiber fabric lifts dirt, oil, and even water from lens surfaces without lens-cleaning fluid This great addition to any astronomer's accessory case will not scratch, streak, or smear delicate optical surfaces 80/20 polyester-nylon fiber blend cloth material absorbs moisture Machine washable for repeated use