%: Transform your back seat into hard bottom back seat cover for dogs a spacious 52-inch wide, 24.8-inch deep haven for your dog with our back seat extender. This seat extender for dogs offers plenty of space to reduce travel anxiety and keep your pet comfortable during long car rides. : Our dog backseat extender hard bottom features a durable honeycomb that supports up to 350 lbs. This car protector for dogs comes with 4mm - honeycomb support which easily removable for flexible use. Ideal for cars, SUVs, and trucks, providing reliable support. & - : Protect your car and truck with our multi-layered truck dog seat cover back seat.