For extra protection and added comfort, when replacing your trucks carpet or rubber floor mat, Brothers recommends that you install an additional layer of jute prior to installation. This additional layer will add plushness and enhance your protection from road noise, heat, and cold. The aluminized outer layer of this special jute creates a unique barrier from elements that are annoying and could affect the durability of your new floor covering. Each roll has enough for one passenger area. Blazers and Surburbans will use up to three rolls for complete coverage.