Back Seat Converts into a Dog Car Bed: This hard bottom car seat cover for dogs features 3 durable load-bearing plates and a hard bottom that transforms your back seat into a comfortable, durable dog seat cover. The back seat extender for dogs increases space by 45%, making it perfect for all breeds. It's a dog travel bed that ensures comfort and protection, ideal for any trip. Sturdy Support up to 400 lbs: Featuring 3 removable honeycomb board plates, this hard bottom dog car seat cover supports up to 400 lbs without collapsing. Designed for small, medium, and large dogs, it ensures safety and comfort. The back seat extender includes a soft sponge layer for added cushioning.