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  • Golden retriever resting peacefully on the Lunna hard-bottom dog car seat extender
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For the ride—and everything your dog brings back

Hard-Bottom Dog Car Seat Extender & Cover

Limited stock available

Hard-Bottom Dog Car Seat Extender & Cover

More room. Less cleanup.

Bridge the rear footwell to create a broader back-seat surface while helping protect the upholstery underneath.

$94.90 USD
$94.90 USD

In stock · Ready to order

More usable back-seat spaceHard-bottom panels bridge the rear footwell.
Less mess on the upholsteryHelps contain hair, damp paws, dirt and everyday spills.
More stable everyday setupAdjustable straps and a non-slip backing help reduce shifting during normal use.
Color

Will it fit my car?

Approx. 52.3 × 24.6 in

Measure your rear-seat width and footwell before ordering. Fit varies by vehicle layout, headrests and seat-belt position.

Full fit and compatibility details below.

Accepted payment methods

  • Ach Direct Debit
  • Amazon
  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa
  • Secure checkout and order tracking.
  • Check measurements and compatibility before ordering.

The ride ends. The hair, damp paws, and cleanup should not have to stay behind.

The Lunna Pet Co. Hard-Bottom Dog Car Seat Extender & Cover creates a broader, more structured surface across the back seat while helping protect the upholstery underneath. It is made for the everyday trips that should feel easier for both you and your dog.

Bring your best friend. Simplify what comes after.

  • Structured hard bottom: Helps bridge the rear footwell and create a more continuous surface across the back seat.
  • Seat protection: The water-resistant, scratch-resistant surface helps contain hair, damp paws, dirt, and everyday spills.
  • More stable placement: Adjustable straps and a non-slip backing help reduce shifting during normal use.
  • Flexible travel routine: The cover folds for storage between road trips, park visits, and everyday errands.

How to install

  1. Unfold the cover completely across the rear seat.
  2. Attach and adjust the straps according to the included instructions.
  3. Confirm that the structured panels are fully supported and the cover does not interfere with doors, seat belts, or vehicle controls.
  4. Use a separate, vehicle-appropriate pet restraint before driving.
  5. After the trip, wipe away loose dirt and allow the cover to dry completely before folding.

Fit and compatibility

  • Approximate size: 52.3 × 24.6 in (132.8 × 62.5 cm).
  • Color: Black.
  • Measure the usable rear-seat width and footwell area before ordering.
  • Fit can vary by vehicle layout, headrest design, and seat-belt position.

Good to know

  • This product is a protective surface and seat extender. It is not a crash-tested pet restraint.
  • Do not allow the cover to block seat belts, air bags, door latches, or driver visibility.
  • Inspect straps and structured panels before every trip.

Care for what matters. Simplify the rest.

View full details

How it works

It bridges the gap.

The hard bottom turns the unused rear footwell into part of a broader rear-seat surface — while the cover helps protect the upholstery underneath.

Golden retriever sitting on the Lunna Pet Co hard-bottom dog car seat extender installed across a vehicle back seat

More usable back-seat space.

Structured hard-bottom panels bridge the rear footwell to create a broader surface across the back seat, while the cover helps contain hair, damp paws, dirt and everyday spills.

  • Hard-bottom support bridges the rear footwell.
  • Water-resistant, scratch-resistant surface helps contain everyday mess.
  • Adjustable straps and a non-slip backing help reduce shifting during normal use.
Lunna Pet Co hard-bottom dog car seat extender unfolded showing the structured panels, side protection and attachment straps

Measure before you order.

Approx. 52.3 × 24.6 in (132.8 × 62.5 cm)
  1. 1Measure the usable rear-seat width.
  2. 2Check the rear-seat and footwell span the extender needs to bridge.
  3. 3Confirm the headrests and seat-belt positions allow the cover to install without interference.

Fit varies by vehicle layout, headrest design, rear-seat width, footwell and seat-belt position. This cover is not a crash-tested pet restraint; use a separate, vehicle-appropriate pet restraint before driving.

The problem

The park is worth it. The muddy paws, loose hair, and back-seat cleanup are not.

A happy dog in the back seat can leave loose hair, damp paw prints, dirt, and one more surface to clean when you get home. Between a narrow rear bench and the open footwell, the back seat may also provide less continuous space than your dog could use.

The shift

Create more usable back-seat space—and help keep the mess off the upholstery underneath.

The structured hard bottom bridges the rear footwell to create a broader surface across the back seat. Above it, the water-resistant, scratch-resistant cover helps contain hair, damp paws, dirt, and everyday spills. Adjustable straps and a non-slip backing help reduce shifting during normal use.

  • Hard-bottom support
  • Water-resistant surface
  • Scratch-resistant surface
  • Folds for storage

Specifications

Measurements and materials

Full specifications
Overall size
Approx. 52.3 × 24.6 in (132.8 × 62.5 cm)
Color
Black
Placement
Vehicle rear seat and footwell
Support
Structured hard-bottom panels
Surface
Water-resistant and scratch-resistant
Stability
Adjustable straps and non-slip backing
Storage
Folds between uses
Compatibility
Varies by rear-seat width, footwell, headrests, and seat-belt position

Check measurements and compatibility before ordering.

Compatibility and limits

What this product does not do

  • This product is not a crash-tested pet restraint.
  • Use a separate, vehicle-appropriate pet restraint before driving.
  • Do not allow the cover to block seat belts, airbags, door latches, vehicle controls, or driver visibility.
  • Fit varies by vehicle layout, headrest design, rear-seat width, footwell, and seat-belt position.
  • Inspect the straps and structured panels before every trip.

Ready when you are

$94.90 USD

Secure checkout and order tracking. Check measurements and compatibility before ordering.