Twin Draft Guard is made from a washable fabric that is abrasion resistant. Not only does the draft guard help keep the heat in and cold out, it also keeps dust, sand, and bugs out while also helping with sound insulation. You can save a lot of power if you are running an air conditioner in your room. An AC needs to work harder if there is air leak from the room, especially from under the door You can adjust the length of the draft guard to suit your door. The length is 36 inches and can be reduced by cutting the foam tube. Hence you can alter it to precisely fit your door or window Stop drafts from doors and windows for good with the Twin Draft Guard. The draft guard has been to snuggly hug doors and windows so that you're protected from drafts from both sides. Once you've cut the special insert to size, just slide it into place and you're done No need to keep adjusting or fussing with it like other door draft stoppers