Built for Peterbilt Sleeper Cabs
Peterbilt Semi Truck Mattresses
SleeperKing mattresses are built to standard semi sleeper cab sizes, and the Peterbilt 379, 389 and 579 all take the same fit: a full 42x80 mattress. Every SleeperKing model — Classic, Serenity and Premium — is available in this size, ships free, and comes with a 120-night guarantee.
Shop Peterbilt Mattresses1,000 comfort coils available · Made in the USA · Free shipping
Semi Truck Mattress Sizes for Peterbilt Models
Every current Peterbilt sleeper — standard and raised roof alike — takes the widest of the three standard semi truck mattress sizes.
| Model | Sleeper Type | Mattress Size | Max Thickness |
|---|---|---|---|
| Peterbilt 379 | Standard sleeper | 42x80 | 8″ – 12″ |
| Peterbilt 389 | Raised roof sleeper | 42x80 | 8″ – 12″ |
| Peterbilt 579 | Raised roof sleeper | 42x80 | 8″ – 12″ |
Don’t see your Peterbilt configuration?
Cab trim packages and non-standard sleeper builds vary by roughly ±1″. SleeperKing manufactures to order, so an off-spec Peterbilt bunk can still get an exact-fit mattress — measure the bare bunk pan and request a custom size if your numbers don’t match the table above.
How to Measure Your Peterbilt Sleeper
- Remove the old mattress and measure the bare bunk pan, not the mattress currently sitting on it — compressed foam and worn springs will throw off your numbers.
- Measure width and length at the narrowest points. Subtract about one inch from each so the new mattress drops in without bulging at the edges.
- Check headroom if you're running a raised-roof 389 or 579 with any kind of overhead storage or bunk curtain track.
- Note the trim package. Two 379s with the same model year can still differ by close to an inch depending on how the cab was optioned.
Which SleeperKing Model Fits Your Peterbilt
Classic
Firm support, budget-friendly, 850 coils. The straightforward replacement for a worn-out factory mattress in a 379, 389 or 579 sleeper.
Serenity Best Seller
Max comfort with copper-infused lumbar support, 1,000 coils. The most common pick among Peterbilt owner-operators running long OTR miles.
Premium
Dual-sided, flippable, 1,000 coils with cool/warm sides. Built for drivers who run hot or want the option to flip the mattress as it wears.
Shop Peterbilt Semi Truck Mattresses
Peterbilt Mattress Questions
What size mattress fits a Peterbilt 379?
A 42x80 semi truck mattress — 42 inches wide by 80 inches long — in a standard sleeper configuration. That's the widest of the three standard semi truck mattress sizes.
Does the Peterbilt 389 take the same mattress as the 379?
Yes. Both the 389 and 579 raised-roof sleepers use the same 42x80 mattress size as the 379 standard sleeper. Fit differs by headroom, not by mattress width or length.
How thick can a Peterbilt sleeper mattress be?
8" to 12", depending on the SleeperKing model and any headroom constraints from overhead storage or a raised-roof bunk curtain.
What if my Peterbilt bunk doesn't match 42x80?
Trim packages and non-standard builds can vary by about an inch. Measure the bare bunk pan first — if it's off-spec, SleeperKing builds to your exact dimensions.
Is there a guarantee on Peterbilt-fit mattresses?
Yes — the same 120-night guarantee that applies to every SleeperKing mattress, standard size or custom.
