Awning replacement fabric is made of durable, heavy-duty vinyl with nylon. Our universal awning fabric can replace and fit most competitor slide out covers; can cover a room extension up to 42. Order fabric replacement to custom fit your awning; the length refers to actual finished length of fabric. Instructions included. Warning: Replacing your awning fabric will require working with the pre-wound spring tension in the roll bar; failure to exercise care and/or failure to follow manufacturers instructions can result in personal injury and/or property damage.