Fit 28-31 ft RVs: This travel trailer cover measures 383.9'L x 106.3'W x 108.3'H, providing a perfect fit for 28'-31' 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 Tear-Resistant: The trailer RV cover is made of 300D Oxford fabric on the top and 210D on the sides, providing over twice the tear resistance of non-woven materials. It's sun-proof, aging-resistant, and has a waterproof rating of 1000mm, making it ideal for rainy and windy conditions. This ensures year-round protection for your RV. The double-stitched seams enhance durability and prevent cracking over time. Windproof Fit: The bottom edge of the trailer cover is made with elastic bands