Petly hard-bottom dog car seat extender installed across a car back seat

Dog Seat Extender

Black
Sale price  $149.99 Regular price $169.99
Skip to product information
Petly hard-bottom dog car seat extender installed across a car back seat
1/9
FOR YOUR FAVORITE CO-PILOT

Hard-Bottom Dog Seat Extender

Sale price  $149.99 Regular price $169.99

More room to stretch out. Less mess to clean up. Give your dog a supported back-seat space with quilted protection for your car.

  • Rigid hard-bottom panels bridge the rear footwell gap
  • 600D Oxford cloth helps protect against fur, mud, and spills
  • Mesh center panel keeps you in sight
ColorBlack
3–7 business day deliveryU.S. orders
30-day returnsView policy
Secure checkoutProtected checkout through Shopify
Product details

Turn your back seat into a cleaner and more comfortable space for your dog. The Petly™ Hard-Bottom Dog Car Seat Extender creates a supported platform while protecting your seats from muddy paws, scratches, fur, spills, and everyday mess.

Made with durable 600D Oxford cloth, soft cushioning, a reinforced support layer, and a non-slip bottom, it’s designed for everything from quick drives to long road trips.

Key Benefits:

  • 🐾 More Space for Your Dog — Extends the usable back-seat area for more room to sit, lie down, and relax.
  • 💪 Hard-Bottom Support — Reinforced panels create a firmer, flatter surface than a standard seat cover.
  • 💧 Waterproof 600D Oxford Cloth — Helps protect against mud, water, spills, drool, and accidents.
  • 🚗 Protects Your Interior — Helps keep seats and doors protected from fur, dirt, scratches, and paw marks.
  • 🛡️ Non-Slip & Secure — Stable bottom and adjustable straps help keep the cover securely in place.
  • 🌬️ Breathable Mesh Window — Lets your dog see you while improving airflow between the front and rear seats.
  • 🧽 Easy to Clean — Wipe away everyday messes without cleaning your entire back seat.
  • 📦 Foldable & Portable — Folds down when you need your back seat back.
  • 🚙 Fits Most Vehicles — Designed for many cars, SUVs, and trucks. Please check your measurements before ordering.
A BETTER BACK SEAT STARTS HERE

Room for the ride.
Coverage for the mess.

A regular blanket covers the seat. A hard-bottom extender adds a supported platform over the footwell, giving your dog more usable space to settle.

Before · Exposed seats and an open footwell
After · A covered, extended space
01

Support underneath

Rigid panels create a flatter surface across the back seat and rear footwell gap.

02

Coverage all around

Quilted 600D Oxford fabric and side flaps help protect your seats from dirt, fur, and muddy paws.

03

A view of you

The center mesh panel lets your dog see the front of the car and allows airflow through.

FROM FOLDED TO ROAD-READY

Set up. Settle in.
Head out.

A simple setup that fits into your routine.

01 / Unfold

Position the panels across the rear seat with the extension over the footwell.

02 / Secure

Attach and adjust the straps to suitable headrests. Position the side flaps without trapping them in the doors.

03 / Check

Check stability and clear access to restraint points before your dog gets in. Use a suitable pet restraint for travel.

A QUICK CHECK BEFORE YOU ORDER

Will it fit your ride?

Car interiors differ. Check your rear-seat width, the space behind the front seats, and your headrest attachment points before ordering.

Ask us about your vehicle

Your fit checklist

  • Measure the full width of your rear seat
  • Check the seat-to-front-seat gap
  • Confirm suitable headrest attachment points
  • Keep seat-belt and harness access clear

The extender provides comfort and seat coverage. It is not a substitute for an appropriate pet restraint.

A FEW GOOD QUESTIONS

Before you bring it home.

When will my order arrive?

Our standard delivery estimate is 3–7 business days after processing and shipment. Delivery times can vary by destination and carrier. Contact us with your destination if you need help before ordering. Shipping questions

What if it isn’t the right fit?

You have 30 days after delivery to request a return for eligible items. Items must be unused and in their original packaging. Contact us before returning anything; exclusions and conditions apply. Return policy

Can you help me choose?

Of course. Email support@shoppetly.com with your product question. For the seat extender, include your vehicle model and rear-seat measurements so we can help you check compatibility. Email Petly

Frequently asked questions

EVERYDAY LIFE, A LITTLE EASIER

Ready for your next adventure?

Choose your option above, or get in touch if you need a hand.

Choose your options
  • 5 stars: 25 (83%)
  • 4 stars: 5 (17%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
J
Jacques Quitzon

The protector looks great and fits in my 2006 kia sportage perfectly! the quality seems to be quite good, so i am hopeful that it will serve its purpose for a while

C
Clark West

Very good, fits well with the car (SUV type).

M
Milo Senger

Well packaged, good quality material, matches the description.

J
John Gusikowski

Great quality. Can be divided into 2/3. Also includes a cover and a belt buckle fastener. Stable, hard base.

N
Nell Prosacco

Very good for transporting my dog without damaging the leather interior.

Y
Yuriko Weissnat

This car backseat mat is very practical for travel. The material is thick and durable, providing good protection for car seats against dirt and scratches. The fastening straps are easy to attach and keep the mat stable. Side pockets offer additional storage space. Easy to clean, ideal for pets or road trips. I am very satisfied and can recommend it!

G
Gwendolyn Rowe

Only just put it in the car looks good quality the dog loves it having more room. can’t comment on how well it keeps the hair off as yet as not been in long enough.

J
Ja Bartoletti

Excellent product, arrived quickly!! Finally something that keeps the car clean and lasts a long time.

A
Ashly Lueilwitz

I am very satisfied.

J
Jazmin Schuppe

I have a hyundai suv. fits very well across the back seats, and the clips that go around the head rests secured it pretty well. also came with a leash that goes right into the seat belt thing that secures my dog really well, but it's a very small clip for their collar so probably wouldn't work for a larger dog. the bottom panels cover the far and are pretty solid. haven't tried yet but looks like the panels can be removed and you can throw the whole thing in the wash. was delivered in a couple weeks so no complaints

G
Gita Koss

Great product! unlike similar items it’s very durable and feels like it’s going to last. recommended.

N
Noel Grant

Fits perfectly in the back of my ranger

E
Elvis Borer

Good service

R
Ruben Block

It was a solid product.

N
Nova Little

Amazing dogs love it need to buy another

D
Donny Parker

Very good bed for dogs, it covers the car perfectly and the material is good. It prevents scratches and dirt on the seats, and the air vent is great.

V
Vanda Corkery

better than I expected

L
Lottie Langosh

A slightly smaller size would have been better for the light vehicle.
It was a bit too big.
Next time, I will measure the size before placing an order.

M
Myra Hauck

You have a very good car cover that is durable and waterproof. It has hard plastic plates in three sections on the seat that provide firm support. The product is very good, I like it.

L
Lindsey Bechtelar

This is really fantastic. highly recommended.
Shipping took a bit long.

C
Cassie Mraz

Very nice for dogs with a handy storage bag

J
Joan Jacobson

Although it took almost a month for the product to arrive, it is of very good quality, so the wait was worth it. It has just the right amount of rigidity, fits the car well, and my two medium-sized dogs don't slip when getting in. Highly recommended.

M
Milford West

Hard plastic inserts are too thin for a large dog weight, definitely not for a human weight. they cut with splinters - cheap quality. will buy sheets of thick plexiglass instead, will work much better. just one seat belt opening. the size is good, for my maltese it’s perfect. waterproof, scratch proof to some point. the idea is great, quality not that much. overpriced, wouldn’t pay more than $20 for it.

B
Bradford Howe

Pretty good, but the hard part of the cover where the dog steps is made of plastic plates and it's not as hard as I expected.

R
Roberto Von

Product matches the photos, is of good quality and practical.

C
Cliff Harvey

Only 1 opening for seatbelt

J
Johanne Nitzsche

Perfect item and highly recommended to everyone.

G
Gracie Jacobs

Excellent! Better than i imagined.

L
Luigi Quigley

The packaging was wrapped in tape on the box, but the product is very good.
It's clean and genuine.

The price is affordable, and this product is the best in this price range.