• Short video of the back seat extender: the empty gap behind the front seats, the extender laid across it as one flat floor, a golden retriever lying on it, the rigid boards sewn inside, the side panels up the doors, and the $89.99 price at the end.
  • Golden retriever lying on a heather-grey back seat extender installed across a car's rear bench
  • Short video of the back seat extender: the footwell gap it covers, the flat platform, the straps going on, two dogs lying side by side, and the side panel guarding the door.
  • The extender's flat platform bridging the footwell gap, showing one continuous level surface with no dog on it
  • A small terrier curled asleep in the middle of the installed platform with empty space all around it
  • Size diagram: the platform is 140 cm or 55 inches wide and 113.5 cm or 44.7 inches front to back, split into 54.5 cm across the bench and 59 cm bridging the footwell.
  • A golden retriever and a border collie lying side by side on the installed extender, showing the usable width
  • The upright side panel standing against the car door, muddy paw prints on the panel and the door card clean
  • View from the front seats through the extender's black mesh window, a dog resting on the platform behind it
  • Close-up of the upright side panel, its rust-red piped storage pocket and black mesh window
  • The rust-piped side pocket holding a coiled lead, a roll of poo bags and a tennis ball
  • Two hands clipping the strap's metal snap hook onto the extender while it hangs from a car headrest post
  • The extender with its side panels unzipped and folded flat on the back bench, leaving the rest of the seat free for a passenger.
  • The back seat extender shown alone on a plain background, panels upright, with its headrest straps and metal snap hooks laid out
  • Close-up of the extender's heather-grey quilted fabric, black bound edge, tan leather-look tab with X-stitching and a black zipper
  • Overhead view of what arrives: the extender folded into a rectangular bundle with its four nylon straps and metal snap hooks laid out.
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Dog Back Seat Extender

Dog Back Seat Extender

A flat 44-inch floor over the seat and footwell, so your dog can lie down.

Other brands we checked sell this kind of hard-bottom platform for $128.95 to $169.95.

$89.99
$119.99 $89.99
Sale Sold out
Free shipping on every order.

🐾 Free plush dog bed while stock lasts. It goes in your cart on its own.

Fits back bench seats and second-row captain's chairs. See which cars fit

Thirty days. Full refund, used or not. How returns work

Free shipping. Ships in 1 to 2 business days from a US warehouse, then arrives 3 to 8 business days later.

  • One-year warranty against manufacturing defects.
  • Sent from a US warehouse, not from overseas.
  • You get a tracking link by email as soon as it ships.

Will it fit your car? It fits back bench seats and second-row captain's chairs. Set up, it's 140 cm (55 in) wide and 113.5 cm (44.7 in) from the seat base to the front seatbacks, and the straps adjust to your own headrest posts. Not sure about your car? Send us the model and we'll check it for you.

  • Sedans and hatchbacks Toyota Corolla, Honda Civic, Mazda3, Toyota Avalon
  • Compact and mid-size SUVs Toyota RAV4, Honda CR-V, Nissan Rogue, Subaru Forester, Mazda CX-5, Tesla Model Y, Jeep Wrangler
  • Larger SUVs and wagons Subaru Outback, Toyota 4Runner, Jeep Grand Cherokee, Chevrolet Traverse, Toyota Highlander and Ford Explorer
  • Crew-cab trucks The bench is wider than most, so it sits inboard of the doors and gives your dog the full flat span

Secure checkout. Questions before you order? Call or text (617) 410-8956 or email support@buckleandbark.com.

Who you are buying from

Buckle & Bark is a Boston store built around one product, a rigid back seat platform for dogs. That is the thing we care about getting right, and everything else we stock is here to go with it.

The phone number and the email address above reach us, not a queue. Ask us anything before you order, including whether it will suit your car, and you get an answer.

Then you get 30 days to try it with your dog. Full refund if it is not right, and used is fine.

Buckle & Bark, Boston, Massachusetts

Not sure it fits your car? Tell us the car and we will tell you how it sits.

Questions people ask first

Will it fit my car?

Set up, it's 140 cm (55 in) wide, which covers the back bench of sedans, hatchbacks, wagons and most SUVs, and it fits second-row captain's chairs too. The straps adjust to your headrest posts. Want to be certain? Measure the width of your back seat door card to door card at the seat base and send it with your car in the form above. We'll check it for you.

Does it sag when my dog stands in the middle?

No. Three rigid boards are sewn inside the platform, so the span across the footwell keeps its shape instead of dipping. That is the part that makes it a bed rather than a cover, and it is the difference between this and a hammock style seat cover.

How do I clean it?

Mud and wet fur wipe off. The woven fabric is water repellent and cleans up with a damp cloth. It is not a machine wash item, so treat it the way you would a car mat rather than a blanket.

How long does it take to fit?

About a minute, with no tools. Padded tabs and adjustable nylon straps with metal snap hooks loop over your headrest posts. When you need the back seat for people again, zips let the panels collapse flat.

When will it arrive?

Shipping is free. It leaves a US warehouse, not an overseas one, within 1 to 2 business days and reaches you 3 to 8 business days after that. You get a tracking link by email as soon as it ships.

What if my dog will not settle on it?

You get 30 days. Fit it, drive with it, let your dog live on it for a month, and if it is not right email us for a full refund of the item price. It does not have to be unused, which is the point of the guarantee. The full terms are in our refund policy.

You know the gap. That drop between the back seat and the front seatbacks, where your dog's legs keep going on every corner.

This turns the bench and that gap into one flat surface, 44 inches from the seat base to the front seatbacks. They stop bracing and lie down.

What you get

  • It holds flat when your dog stands in the middle. Three rigid boards are sewn inside the platform, so the span keeps its shape instead of dipping into the footwell. That's what makes it a bed rather than a cover.
  • Bigger dogs stretch right out. The bench and the gap in front of it become one flat area.
  • Your door cards stop taking the damage. Quilted panels stand upright against both doors and catch the claw marks and muddy paw prints.
  • You can still see your dog. Mesh windows in both panels keep the air moving and leave the view from the driver's seat clear.
  • The leash and the tennis ball have somewhere to go. There's a flap pocket on the inner panel for the treats and the poop bags too.
  • It goes on in about a minute. Padded tabs and adjustable nylon straps with metal snap hooks loop over your headrest posts, and there are no tools involved.
  • Mud and wet fur wipe off. The woven fabric is water repellent and cleans up with a damp cloth.
  • It gets out of the way. When you need the seat for people again, zips let the panels collapse flat.

Color: heather grey, with tan tabs and a rust-red piped pocket.

The first drive tells you

They circle once, work out that the floor goes all the way across now, and flop down with a sigh. Then they stay there, instead of standing up again at the next turn.

How big is it, and will it fit your car?

Set up, it's 140 cm (55 in) wide and 113.5 cm (44.7 in) from the seat base to the front seatbacks. That length comes in two sections: 54.5 cm (21.5 in) sitting across the bench and 59 cm (23 in) bridging the footwell. The side panels stand 80 cm (31.5 in) tall and the rear panel is 47 cm (18.5 in).

It fits back benches and captain's chairs

Fifty-five inches across covers the back bench of sedans, hatchbacks, wagons and most SUVs, and it fits second-row captain's chairs too. The straps adjust to your headrest posts.

  • Sedans and hatchbacks. Toyota Corolla, Honda Civic, Mazda3, Toyota Avalon.
  • Compact and mid-size SUVs. Toyota RAV4, Honda CR-V, Nissan Rogue, Subaru Forester, Mazda CX-5, Tesla Model Y, Jeep Wrangler.
  • Larger SUVs and wagons. Subaru Outback, Toyota 4Runner, Jeep Grand Cherokee, Chevrolet Traverse, Toyota Highlander and Ford Explorer.
  • Trucks. The bench in a crew cab is wider than most, so it sits inboard of the doors and gives your dog the full flat span.

Want to be certain before you order? Measure the width of your back bench, door card to door card at the seat base, and email it with your car to support@buckleandbark.com. We'll tell you how it will sit.

In the box: 1 back seat extender.

How we compare

Buckle & Bark Other brands
Price $89.99 $128.95 to $169.95
Send it back after your dog's used it Yes, full refund for 30 days Only if it's unused, or clean and in good condition
Will it fit your car? Fits benches and captain's chairs, plus a free fit check Sold as "universal fit"

Other brands' prices and return terms checked on their own websites, October 1, 2026.

A free plush bed, while stock lasts

Every order with an extender comes with one plush bolster dog bed at no charge. It has long faux fur and a raised edge on three sides. Add the extender and the bed goes into your cart on its own, so there's no code to type. Lay it on the platform for long drives, or keep it on the couch at home.

Two dogs, or two cars: 10% off the second

Put two extenders in the cart and the second one is 10% off, with no code to type. That's $8.99 back, and the free bed still comes with the order.

Thirty days with your dog, on us

Fit it, drive with it, let your dog live on it for a month. If it's not right, email us for a full refund of the item price, and it doesn't have to be unused. Every unit also carries a one-year warranty against manufacturing defects: a seam that opens, a zip that fails, a buckle that breaks, a support board that cracks in normal use.

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