HEAVY-DUTY TEAR-RESISTANT MATERIAL: The trailer cover top material is upgraded from 5 layers to 7 layers of non-woven fabric, 3-layer on the sides. Not only is the weight thicker, but also the trailer cover is mixed with UV-resistant composite materials and waterproof membrane to prevent fabric aging, decomposition, and tearing. It can avoid UV rays, snow, dust, and scratches, and extend the life of the RV WINDPROOF & WATERPROOF: The side of the camper cover is equipped with 5 adjustable elastic straps and buckles. In addition, it is also equipped with 2 extra-long vertical wraparound straps, which can make the RV cover close to the RV body and prevent it from being blown away or torn by strong winds. The mixed waterproof membrane inside the fabric can prevent rainwater from entering the interior of the RV on rainy days RICH ACCESSORIES LIST: RV trailer cover 18-20ft *1, Tire covers *4, Lader cover *1, Jack cover *1, Reinforced straps *2, Side buckle straps *5, Front and End buckle straps *4, Gutter covers *6, Elastic Banding with hook *4, Adhesive repair patches *2, Toss Bag *1, Storage Bag *1, Installation Instructions *1, You can read the instructions and videos before installation to make installation easier. There are front and rear markings on the front and rear of the RV, and the weighted buckle toss bag can simplify installation ELABORATE DESIGN: The 18-20ft camper cover is equipped with 6 vents to reduce wind pressure and release moisture to keep the RV dry and ventilated; 4 reflective strips on the front and 2 reflective strips on the back to avoid collisions at night; there are 3 rollable zipper panels (2 on the passenger side and 1 on the rear side), which can enter the trailer at any time and make it easy to check the situation inside the RV GOOD SERVICE: Measuring your Travel Trailer's length, width, and height before purchasing can greatly reduce the risk of an inappropriate RV. If you encounter problems during purchase, installation, or use, please contact our customer service team. We provide a 24-month warranty service. We are committed to serving every one of our customers well MOFEEZ Travel Trailer RV Cover