Hard Bottom Back Seat Extender for Dogs – Waterproof Quilted Dog Hammock with Side Protection, Non-Slip, Heavy Duty Pet Seat Cover for Cars, SUVs & TrucksBrand: JRW Stores Color: Neutral Features: TESTED TO HOLD UP TO 500LBs: Built for large breeds and multiple dogs, this back seat extender for dogs features a reinforced hard bottom that supports up to 500 lbs without sagging, keeping your pets steady even on bumpy roads. 100% WATERPROOF, PROTECT BACKSEAT CLEAN & ANTI SCRATCHING: The waterproof dog seat extender can cover the entire back and around, the front and rear seats, bottom and both side doors