MIXJOY Dog Car Seat for Large Medium Dogs - Back Seat Extender

In this review of the MIXJOY Dog Car Seat for Large Medium Dogs, the bottom line is simple: it is designed for owners who need a roomy, sturdy back seat solution that keeps a large dog comfortable while still allowing a passenger to sit in the rear. The single biggest reason to buy is the integrated back seat extender that increases usable space by about 40% so larger dogs and their bedding fit without crowding the cabin. Installation is straightforward and the six-layer construction feels durable and reassuring for everyday travel.

Key Features

• Back Seat Extender: Extends the rear seat area by roughly 40% to give larger dogs a more comfortable resting platform and prevent them from sliding into the footwell.
• Passenger Friendly: Designed so a backseat passenger can still sit next to the dog when using the extender rather than a full wrap-around cover.
• Large Size: The large dimensions of 28.7in x 22in x 21.5in make this seat suitable for most medium and large dogs and for use in cars, SUVs and trucks.
• Waterproof and Durable: Constructed from 600D PU waterproof Oxford fabric with multiple inner layers to resist scratches, mud and spills while remaining easy to wipe clean.
• Safety and Comfort: Includes a free safety belt attachment and slip-resistant features to help keep active dogs secure during sharp braking or turns.
• Practical Storage: Built-in dual storage pockets and mesh side panels improve organization and airflow to reduce anxiety on longer trips.

Who It's For

The MIXJOY car seat is ideal for owners of medium to large dogs who want extra floor-level space in the back seat for a pet bed or for dogs that need more room than a standard seat cover allows. It also suits families who occasionally need a rear passenger alongside the pet instead of fully dedicating the back seat to the dog.

It may be less suitable for owners who need a full wrap-around hammock that blocks the rear row entirely or for very small cars where the extender dimensions would crowd the cabin. For crate-dependent dogs or those requiring rigid restraint, a hard-sided travel carrier is still a better option.

Pros & Cons

Pros

• Provides a noticeably larger resting area for medium to large dogs, improving comfort on trips.
• Sturdy six-layer build with waterproof 600D fabric holds up to everyday wear and is easy to clean.
• Includes safety belt and slip-resistant features that help keep active dogs secure.
• Mesh sides and storage pockets add practical organization and better air circulation.

Cons

• The large size may limit fit in very compact cars and the full wrap configuration prevents rear passengers from sitting.
• While robust, very heavy chewers or persistent scratching could eventually damage fabric like any soft-sided cover.

Specifications

Product type	Back seat extender dog car seat / hammock
Size (L)	28.7in x 22in x 21.5in
Material	600D PU waterproof Oxford fabric with PP cloth, 210D Oxford, PP cotton and load-bearing plates
Key feature	Expands rear seat area by 40% to increase space
Included accessories	Free dog safety belt and two storage pockets
Compatibility	Fits cars, SUVs, family cars, limousines and trucks

Our Verdict

The MIXJOY Dog Car Seat is a practical, value-minded choice for owners of medium and large dogs who need more rear-seat space without losing the option to carry a backseat passenger. Its layered, waterproof construction, safety belt and storage pockets make it a solid everyday travel solution that balances comfort, protection and convenience.

Frequently Asked Questions

Will this fit my SUV back seat?
Yes, the large size and extender design are made to fit most SUVs, family cars and trucks but measure your rear seat area to confirm a good fit.

Is the cover waterproof and easy to clean?
Yes, the outer layer is 600D PU waterproof Oxford fabric and the cover wipes clean easily and resists mud and spills.

Can a person still sit in the back with a dog using this seat?
Yes, the extender version is designed so a passenger can sit next to the dog; a full wrap-around configuration would prevent a rear passenger from seating.