Dog Car Seat Cover for Back Seat, Hard Bottom Back Seat Extender for Dogs - Supports 400lbs, Back Seat Pet Cover, Dog Hammock for Car SUV and TrucksHARD BOTTOM: Back seat extender for dogs is more sturdy and stable than those soft bottom dog hammock, can hold up to 400 pounds, during the drive prevent dog falls. Fit most cars, mid size SUV and truck. EXPANDED SPACE: The dog car seat cover with hard bottom extends the backseat into a car bed. Enabling complete coverage of the rear area. The back seat extender provides your dogs with maximum space. Suitable for dogs of all breeds, this makes the