Swiffer Heavy Duty Dusters TRAP + LOCK up to 3x more dust & allergens. 360 degrees of specially coated fibers grab onto dust & 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 & dust mite matter.Swiffer Heavy Duty Dusters TRAP + LOCK up to 3x more dust & allergens.vs. feather duster, common inanimate allergens from cat and dog dander & dust mite matter. Specially coated fibers grab onto dust & don't let go. Uniquely designed to trap + lock dust from every direction.