Hey if you're looking for a versatile cat seat cover for your dog, this one is not bad. It can hang like a hammock in your back seat, has a mesh vent so you can see your dog, and it can be converted to use in your back storage area. If you're not concerned with a name brand product, this one has pretty good reviews and is a decent price. I also think there is a coupon available for an extra $4 dollars off, making it $34.99. Not bad with free shipping if you're a prime member.
Amazon.com : 4-in-1 Dog Car Seat Cover, OKMEE Convertible Dog Hammock Scratchproof Pet Car Seat Cover with Mesh Window 2 Seat Belts, Durable Nonslip Dog Seat Cover for Back Seat Protector for Cars Trucks SUVs : Pet Supplies