Toy Hauler Trailer Cover 5th Wheel Toy Hauler Advanced 3-Layer Protection (36' to 37') 3 High-Tech Layer Protection: Spun Bond Polypropylene, Microporous Breathable Film and Another Layer of Spun Bond Polypropylene Exclusive self-adjusting hold down strap system holds the cover securely to prevent wind flapping New vented design improves air circulation, which reduces lofting and reduces inside moisture Includes: 4 Free Universal Fit Tire Covers 2 Year Warranty