One-Wipe products are specially treated 100% cotton cloths that absorb and lock in dust. The special treatment attracts and bonds dust to the cloth, giving you healthier and cleaner air. With the Ultimate Duster you don"t need dusting spray... which saves you money! Once a dirt build-up occurs, One-Wipe cloths can be rejuvenated by hand-washing. Sprays and other cloths simply scatter dust only to have it re-settle later. The ULTIMATE DUSTER is washable and reuseable. When completely soiled, hand wash in lukewarm water with mild detergent and air dry. Size of the Ultimate Duster is approximately 14" x 18". Cotton Dust Cloth Reusable Washable Fits floor sweepers!