Fit 20-22 ft RVs: This travel trailer cover measures 276.8'L x 103.1'W x 104.7'H, providing a perfect fit for 20'-22' Class-A trailers. The set also includes 4 tire covers. For proper installation, please measure your RV accurately, including the bumper, ladder, and spare tire (excluding hitch). We provide a variety of sizes to ensure the perfect fit for your RV. Waterproof and Sun-proof: Crafted with a durable 4-layer top and 3-layer sides of wear-resistant, non-woven fabric, our trailer RV cover shields your RVs from rain, snow, strong winds, bird droppings, dust, and scratches. It features excellent breathability and sun-proof properties, reducing sun damage and safeguarding your RV against harsh weather conditions year-round. Double-stitched seams ensure long-lasting durability without cracking. Windproof Fit: The bottom edge of the trailer cover is made with elastic bands