The Budge Standard 5th Wheel RV Cover has a top panel that is made from a 3 layer water resistant spunbond polypropylene. This cover features single layer side panels that are durable and lightweight. The Standard RV cover will protect against sun, dirt, occasion rain and heavy dust. Air vents are included on the top of the cover to prevent billowing. Full height zippered panels are also included so you can access your RV while it is covered. This cover comes with tie down rope system and elasticized bottom corners. This cover is fully breathable and UV treated to prevent sun damage.