Petco offers EveryYay Road Trippin' Car Seat Cover for $29.99 (reg $39.99). Free shipping on orders over $35. 

Product Description:
Outings with your pets can often leave your car interior in need of a carwash, especially if you've hit the beach or suddenly got caught in the rain. We get it! That's why our EveryYay Road Trippin' Black Car Seat Cover uses a waterproof backing to contain messes and leave your backseat free from spills, loose hair, and grime. To further protect your seats, this backseat shield is made with a durable rip-stop fabric. Even with all this heaving lifting our adjustable backseat cover ensures a comfy ride thanks to a machine-washable faux shearling fleece pad. Now you can spend more time enjoying your car rides and less time cleaning up after them.

• - Waterproof & tear-resistant construction protects car interior
• - Strong, adjustable straps for a dependable and easy installation
• - Transitions between pet and human passengers with ease
• - Seatbelt slots let you accommodate human passengers with ease
• - Removable faux shearling fleece blanket