After observing the single color of the door draft blocker, i marked each end’s top with an X to make sure I always keep the top side up, facing me, to help maintain the bottom side down where it meets the floor and any present dust. The Extra Large 4 inch diameter is best for me because I keep it on the floor. When I open the door to leave, the Draft Stopper gets pushed, and when I come inside, I move the Draft Stopper back into its place with my shoe. The 42 inch length is best for my door because I want some overlap beyond the door frame to ensure maximum draft stoppage, as well as simplicity and ease of positioning with my shoe, with no unnecessary handling. I also appreciate the all-natural construction because it’s my choice. I bought it directly from Maine Sales instead of from Amazon because Amazon won’t let me write reviews because of my choice of books and charities when that was a thing. There’s no other reason I can determine. Thank you to Maine Sales, and thank you to the customers who keep Maine Sales in business.