Heavy duty dusters trap + lock up to 3x more dust and allergens 360 degrees of specially coated fibers grab onto dust and don't let go. They are uniquely designed to trap + lock dust from every direction vs feather duster, common inanimate allergens from cat and dog dander and dust mite matter. Swiffer Heavy Duty Poly Fiber Refill (6-Count) in Yellow | 3700016944