EXTENDS MID-SIZE SEAT TO FLAT DECK Trimmed for SUVs and mid-size pickups, the new 2025 backseat dog cover and extender uses a hard-board core and waterproof Oxford quilt. Unfold, strap to the headrests, clip the side wings, and you ve bridged the seat gap for pets or cargo. The washable surface stops grocery bags tipping, lets pups sprawl, and folds in half for quick stow when passengers need legroom. SPACIOUS & STABLE FOR ALL BREEDS These extending car seat covers for dogs (52.4 long, 24.8 wide, and 21.7 high) feature a hard bottom that expands space by 40%, supports up to 400 lbs, and includes firm inserts to prevent slipping ideal for multiple large dogs or older, anxious pups. PROTECTED DOOR PANELS Shield doors easily with our dog seat cover for back seat with patented door panel protection (U.S. Patent No.