This rigid internal structure integrates with the vehicle seat belt to provide added security for pets. Installs securely in one minute in either front or back seat. A roomy, fully padded interior gives pets up to 30 pounds room to relax and is perfect for multiple pets. The inside floor of the basket is nine inches above the vehicle seat so pets can easily see out while traveling. Unlike foam-based pet car seats, the On Seat Pet Booster will not trap odors and cleans easily to stay looking and smelling fresh. Adjustable safety leash included.