SWIFFER HEAVY DUTY DUSTER REFILLS pick up 5X MORE* dust & allergens.** Heavy Duty Duster has DUST-BUSTING STRIPS to break down layers of built-up dust, and thousands of fluffy, SPECIALLY-COATED FIBERS that grab onto dust in every direction and don't let go. 360° DESIGN makes it easy to clean hard-to-reach places, like blinds and around knickknacks. *vs. feather duster after 9 uses **common inanimate allergens from cat and dog dander & dust mite matter