CARSEAT EXTENDER FOR CARS, TRUCKS AND SUVS - Dog seat extender measures 21 1/2" long x 11 3/4" wide x 11 3/4" high. Designed to be used in between the first and second rows in most mid-sized cars and SUVs, and works as a front seat extender for dogs in pickup trucks and small cars. Back seat gap filler for dogs creates a larger back seat platform that is safer because it prevents your dog from falling into the spaces between the front and back seats when the car stops suddenly.Padded, quilted top is a soft place for you pet lie down. Added storage compartment has a zippered lid and adjustable dividers to keep all your pet travel supplies organized.Made of durable, rigid MDF that won't lose its shape or collapse under your dog's weight; supports up to 100 pounds.Water resistant polyester fabric inside and out is easy to clean; dirt, mud, and other messes wipe right off.