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What size mattress fits in
a Peterbilt 389?

Looking to upgrade the OEM mattress in your Peterbilt 389 sleeper cabin? Keep reading to learn more about the best truck mattress for the job.
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Out of all the popular and commonly used sleeper semi-trucks on the road today, the Peterbilt 389 is a solid choice among enthusiasts and professional truck drivers alike. Like some Kenworth trucks, the Peterbilt 389 comes equipped with an efficient Paccar MX-13 engine along with other notable features including all disc brakes, a configurable dash, and an all-aluminum cab to reduce truck weight. In terms of rest, relaxation, and overall comfort, the Peterbilt 389 is a venerable choice that offers a spacious cab for sleeping. The 389 also has ample shelving, storage, overhead lighting and excellent cooling for a comfortable experience. Available in a variety of configurations and trim packages, the Peterbilt 389 sleeper cabin was built to provide comfort and safety wherever work takes you.

The Peterbilt 389 Mattress

The Peterbilt 389 sleeper semi-truck unit is available in four different sizes with various storage, shelving, and sleep configurations depending on your needs. However, the 579 is most commonly equipped with a 36-inch by 80-inch mattress or a 42-inch by 80-inch mattress. SleepDog® has two different mattress models both sizes, making it easy to upgrade your truck mattress. No matter which mattress model you choose, SleepDog® mattresses are designed to give you the best rest possible while on the road. While we always recommend measuring the sleeper berth and current mattress(es) before buying a replacement mattress to ensure a perfect fit, the following SleepDog® mattress size is most often compatible with the Peterbilt 389:

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About the Peterbilt 389 Sleeper Cabin

The 389 is available in four different configurations – the 44-inch, 58-inch, 72-inch, or 78-inch sleepers. All configurations and trim packages offered in the 389 have a generous cabin size to help you optimize both productivity and comfort.

Why Sleep on a SleepDog® Mattress in Your Peterbilt 389?

With a SleepDog® Mattress in your Peterbilt 389, not only can you sleep more comfortably, but you can rest assured that SleepDog® Mattresses are DOT approved. These mattresses withstand common wear points better than your stock, factory installed mattress, helping drivers sleep better and drive safer. Every SleepDog® mattress is constructed with more supportive memory foam, more breathable material, and an additional layer of plush comfort to ensure more comfortably and reliable sleep.

The convenience of a SleepDog® mattress, currently available only online and shipped directly to wherever your home may be, is unmatched for with free shipping, free returns, and a 10-year warranty. If you have questions about what mattress best suits your Peterbilt 389, please contact our Customer Service team for help!

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BigDawg Mattress™ Product Image
BigDawg Mattress™
Our best-selling mattress made with a 9” plush, multilayer memory foam & pillow-top construction.
Starting at $524.25 $699
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SleepDog® Mattress Product Image
SleepDog® Mattress
7” multilayer memory foam construction infused with CoolRest® technology for maximum comfort & support.
Starting at $434.25 $579
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