Keep the outside air out and the inside air in with this easy and effective Twin Energy Saving Door Draft Stopper. This double-sided insulated draft guard creates an air-tight, draft-proof seal. Works on both doors and windows to block cold, heat, wind, dust, and even pesky insects. The fabric sleeve holds customizable foam cylinders to ensure a perfect fit in even your draftiest space. Works on any floor, even carpets, to insulate living areas, garages, and basements. This 38" draft guard helps your home’s heating and cooling run more efficiently, saving you money.