REEVAA 2.0 Hard Bottom Back Seat Extender for Heavy-Duty Dogs, Dog Car Seat Cover with Cushion Sponge, Waterproof Dog Hammock with Mesh Window for Car, Universal Fits for SUV/Small Truck, L, BlackBrand: REEVAA Color: Black Features: 600LBS Anti Collapse Hard Bottom Built for Heavy Duty Dogs Heading out with multiple big breeds that jump and play? Three high density panels create an anti collapse hard bottom supporting 600 lbs without sagging. Eliminates tilting and wobbling for a rock solid, stable platform during active movement. 45% More Space & Superior Safety for Large Breeds Your pup deserves room to stretch and relax fully. Expands