This ADCO RV Roof Cover Fits Class A and Class C Travel Trailers. It attaches using a wheel anchor system to prevent straps from contacting the side-walls. This ADCO cover fits toyhauler and 5th wheel. It installs quickly and easily. This white Tyvek cover for your RV works to eliminate black-streaks and helps prevent costly damage from the environment. It provides UV-resistance to prevent fading and is also water-resistant, while remaining breathable. This item comes with a handy storage bag when it's not in use.