Duststop Trimmable Polyester Air Vent Filters, 4 x 10-in, 12-pk

Duststop's trimable polyester air vent filters help keep household dust at bay by trapping particles before they reach your living areas. The 4 by 10-inch filter sheets simply fit over most floor air vents and can be tailored to size. If changed every 12 weeks or so, the filters won't notably affect airflow while helping curb dust, especially benefiting allergy sufferers. Duststop's pack of 12 filter sheets makes it easy and economical to cover multiple vents.