Back Seat Extender+40% Space for Dogs: The MIXJOY dog car seat extends 40% space in the back seat. Large dog car seat provide a larger and more comfortable resting space for dogs. Passengers Can Sit Next to Dogs: Using dog car seat can better utilize the space of backseat of a car, passengers can also sit in the back. If you use the full wrap-around dog over, the rear seats will not seat people. Extra Large Dog Car Seat : 1, MIXJOY large back seat is 34*22*21.5in and suitable for most dogs; 2, Car dog travel bed mattress suitable for Limousine, Family Car, SUV and Truck. Prevents Dogs Falls and Seat Scratches: If your dog is very active, or if you brake sharply while driving, the seat cover help your dog stays on and keep your dog safe, giving you peace of mind during your travel.