SUMEX COVXXL1 XX-Large Waterproof Car Cover for Outdoor Protection - Fits SUVs, Trucks & Large Vehicles - All-Weather Dust & UV Resistant

Surprisingly good so far, considering how much (more) you can pay for a car cover. I bought it for my BMW Z4, which it fits very well. The car isn't used often and sits in the driveway, under a huge willow tree. The tree sprays sap everywhere and at this time of year drops thousands of leaves. Many birds perch or roost in its branches. My other car is covered in sap, bird droppings and leaves, but this car is used regularly by my wife, so uncovering it and covering it isn't practicable.The cover is easy for me to put on, on my own. The underside of the material is coated with some kind of flock, ensuring it doesn't scratch. The front and rear are elasticated. There are fairly large eyelets but only in the middle. I didn't bother doing anything with the supplied string but put the hook of a bungee through the middle eyelet and then put the other end of the bungee around one of the rear wheel spokes. I then did this with another bungee to the front wheel. This creates enough tension to hold the cover in place securely (survived a recent gale). I only did this on one side - it seems to create enough pull to keep the cover on all around.[UPDATE] The cover still came off, front and back in a severe gale (we've had a lot of these in North Yorkshire lately). I bought some "Faithfull TARPCLIPS" on Amazon