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The Best Mattress for
Your Over the Road Sleeper

Being comfortable and getting a good night’s sleep is just as important on the road as it is at home. Use this guide to help find the best truck mattress for your semi-truck.
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Long, overnight drives can really make a truck driver appreciate (or downright hate) their over the road sleeper. Feeling comfortable and getting a good night’s sleep is just as important on the road as it is at home. With so many sleeper semi-truck brands and models to choose from, it is important to consider the overall comfort and livability they provide before choosing one. While there are many other features to consider, such as cabin space, mattress length, storage, and relaxation amenities, the best sleeper semi-truck tractor units stand out with an impressive score for driver comfort, ergonomics, and productivity features. In this guide, we outline several of the most popular semi-truck models and the SleepDog® truck mattress sizes that work best in those spaces.

Mattress by Truck Make

Freightliner Trucks

Freightliner Cascadia

Freightliner Cascadia

Common Mattress Sizes: Size A 36" x 80", Size B 39” x 80”, and Size C 42” x 80”

One of the most popular sleeper semi-truck tractor units in recent years, the Freightliner Cascadia®, offers sleeper cabins that extend up to six feet beyond the day cab. The Cascadia® comes with a choice of high-top interiors, offering enough space for overhead storage or even a second bunk. The interior of the Cascadia® was designed with driver relaxation and downtime in mind. On the Freightliner Cascadia® website, you can even build a custom selection of features to outfit your unit. Of course, while your Freightliner comes with a 36 inch by 80 inch factory mattress, a common size for truck mattresses, you might want to consider replacing or upgrading it for higher quality comfort. With a SleepDog® Mattress in your Freightliner Cascadia, not only can you sleep more comfortably, but you can sleep at ease knowing that SleepDog® Mattresses are DOT approved. These mattresses also withstand common wear points better than stock, factory installed mattresses, helping drivers sleep better and drive safer.

Freightliner eCascadia

Freightliner eCascadia

The Freightliner eCascadia is one of the newest, most cutting-edge semi-trucks on the market. Only having been introduced in recent years, it is already one of North America’s best-selling class 8 trucks. On a full charge, the eCascadia can travel up to 250 miles, and it recharges up to 80% in just 90 minutes. The eCascadia has a length of 306”, a width of 100.7”, and it stands at 116.2” tall. The Freightliner eCascadia is currently only available in a day cab 116” configuration. Given that this is a newer vehicle, we expect more configuration options to be developed in the future.


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Volvo Trucks

Volvo VNL 860

Volvo VNL 860

Common Mattress Sizes: Size C 42” x 80”

The VNL 860 sleeper cabin comes with a roomy 77-inches of sleeper space, making drivers feel relaxed and closer to home. The Volvo VNL 860 comes packed with innovative details such as soft LED lighting, electric outlets for the bunks, easily reachable controls, smart storage areas, a large refrigerator, removable floor mats, and more. Overall, the VNL 860 creates a comfortable and calm work and sleep environment for drivers. The VNL 860 also offers one of the first integrated reclining bunks in a sleeper. The bunk is fully adjustable, so it is like having your favorite recliner in your cab with you. The reclining bunk can also efficiently be stowed away to make room for an optional table and workstation configuration. SleepDog® offers a variety of quality, aftermarket mattresses which will maximize the comfort and support of the sleep space in your sleeper cabin by offering more supportive memory foam, cooler, more breathable cover material, and thicker, more substantial mattress padding. The two mattress options SleepDog® offers come in standard sizes, so you can be sure to find the perfect replacement for the stock Volvo semi-truck mattress, while also getting a more comfortable and reliable sleeper mattress.

Volvo VNL 760

Volvo VNL 760

Common Mattress Sizes: Size B 39” x 80”

The VNL 760 is one of the most popular, best-selling premium high-roof sleepers that Volvo has to offer. The cab has a width of 89.4 inches and a height of 123.7 inches and at the driver’s seat, the interior height of 81.5 inches allows for ample headroom. Keeping in mind that the VNL 760 offers 81 inches by 39 inches of sleep space, we recommend upgrading to a truck mattress designed to fit within those specs, such as a SleepDog® Size B mattress, which measures 80 inches long by 39 inches wide.


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Kenworth Trucks

Kenworth T680 Advantage

Kenworth T680 Advantage

Common Mattress Sizes: 38” x 80”

With a large following of truckers, the Kenworth T680 is one of the most popular over the road sleeper models. The T680 is touted as one of the most fuel-efficient trucks that also comes equipped with high levels of luxury and comfort. The sleeper cab configurations for this semi-truck model range from a 40-inch flat top sleeper to a 76-inch high roof sleeper. While the 76-inch configuration is the most spacious, each configuration comes with a substantial amount of sleep space. All T680 models are built with a relaxation area, as well as overhead storage and headroom. The Kenworth T680 has an optional ’Driver’s Studio’ package, which offers a set of premium options, including a swivel seat, swivel table, LED lighting, swivel TV mount, and exceptional audio. No matter what sleeper cab configuration you drive, they all come stocked with the same 38” by 80” mattress size. The compatible SleepDog® or BigDawg® mattress size for the Kenworth T680 Advantage sleeper cab is our 39” wide by 80” long, Size B mattress.

Kenworth W900L

Kenworth W900L

Common Mattress Sizes: Size C 42” x 80”

As one of Kenworth’s most popular heavy duty trucks, the W900L lives up to the hype with its reliability, durability, and ease of maintenance. Available in 38-inch, 62-inch, 72-inch and ultra-premium 86-inch sleeper cabin configurations, it boasts 130” from bumper to back-of-cab and exclusive interior styling that offers plenty of space for amenities such as a full-length door-enclosed hanging closet, fridge/freezer, and fold-down desk. The sleep space itself is large enough to house a 42” x 80” mattress, which is equivalent to a Size C SleepDogâ mattress. Upgrading to one of our SleepDogâ truck mattresses can lead to an even more luxurious over-the-road experience, leaving you refreshed and ready to hit the road in your W900L every morning.

Kenworth W990

Kenworth W990

Common Mattress Sizes: Size C 42” x 80”

The Kenworth W990 is a great choice for truckers who want to add a personal flair to their truck outfit. Not only is the W990 the epitome of power, luxury, and design, it also comes with optional customizations, such as a unique Driver’s Studio equipped with a workspace and mini fridge. The sleep space is no less impressive. The W990 is available in three different sleeper configurations: a 40-inch flat top sleeper, a 52-inch mid-roof sleeper and a 76-inch mid-roof sleeper. All three of these configurations are commonly outfitted with a 42” x 80” stock mattress, making the SleepDog® or BigDawg® Size C mattress the perfect upgrade. Since the Kenworth W990 is available in so many different sleeper cab configurations, we still suggest measuring your current mattress and sleep space to ensure you upgrade to the appropriate mattress size.


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International Trucks

International Lonestar

International Lonestar

Common Mattress Sizes: Size A 36" x 80" and Size C 42” x 80”

For years, the International Lonestar has been highly-rated among truck drivers. Even with its outstanding popularity, the makers of this truck continue to improve and enhance its features. With such a high quality sleeper, truck drivers can look forward to a good night’s rest on the road in their International Lonestar. This semi truck model alone comes in five different configurations including a 56” low roof sleeper, a 56” hi-rise sleeper, a 73” hi-rise sleeper, a 73” sky-rise sleeper, and a day cab. The Lonestar bunk comes with a factory installed innerspring mattress that commonly fits a 42 inch by 80-inch mattress, equivalent to the SleepDog® Size C mattress.

International Lonestar

International ProStar

Common Mattress Sizes: Size A 36" x 80", Size C 42” x 80”

The International ProStar is an industry leader known for its durability, efficiency, and safety. This truck comes in four different configurations: a 56” low-roof sleeper, a 56” hi-rise sleeper, a 73” hi-rise sleeper, and a 73” sky-rise sleeper. In keeping with the idea of customizing your over-the-road experience, International Trucks offers a “build your own” option for the International ProStar model. The cab, color, exterior/interior design, and drivetrain are all customizable to your preferences. The sleeper cabin in the International ProStar ensures that you will have a more than comfortable space to rest and relax while on the road. Depending on your sleeper configuration, the ProStar comes stocked with either a 36” x 80” mattress (found in the 56” sleeper), a 42”x80” mattress (found in the 73” sleeper) or a 33.5”x80” (also found in the 73” sleeper). SleepDog® mattress sizes that are generally compatible with the International ProStar include our Size A mattresses, measuring 36”x80”, and our Size C mattresses, measuring 42”x80”.

International LT Series

International LT Series

Common Mattress Sizes: Size A 36" x 80", 33” x 80”, and Size C 42” x 80”

The International LT Series is another top-rated truck in the transportation and logistics industry largely due to its durability, reliability, and overall safety. Like the ProStar, the LT Series is available in four different configurations and can be customized with a “build your own” option to ensure it is equipped to meet your long haul needs. In addition to the available customizations, there are standard features and enhancements that come with your truck no matter the customer specifications. In the sleeper cab, some of the standard conveniences include a 12-volt power supply, sleeper windows, and a sleeper control panel. Both 56” inch sleepers come with a 36” x 80” innerspring mattress, while the 73” sleeper upper bunk comes stocked with a 33” x 80” mattress, and the 73” sleeper lower bunk accommodates a 42” x 80” mattress. All three of these mattress sizes are relatively common within the trucking industry and are often sold by specialty truck mattress retailers like SleepDog® Mattress. The SleepDog® and BigDawg® mattresses that are compatible with the International LT sleepers include our Size A, 36” x 80” mattress, perfect for the International LT 56” sleeper cabins, our Size C mattress, which measures 42” x 80”, making it the best upgrade for the International LT 73” cab with lower bunk, and our Size D, 32” x 80” mattress exclusively available in the BigDawg® mattress™ construction, making it a great upgrade option for the International LT 73” cab upper bunk.

International RH Series

International RH Series

Common Mattress Sizes: Size A 36" x 80"

The International RH series provides a top-notch solution for fleets looking for an efficient way to deliver locally and regionally. The RH series is available in several different cab configurations, offering drivers the flexibility to choose their preferred cab. There are two day cab models and three sleeper cab options: the 56” low-roof sleeper, 56” high-rise sleeper, and 56” high-rise sleeper with roof fairing. All three of the 56” sleeper configurations come stocked with a 36” x 80” OEM mattress. The SleepDog® Size A mattress measures 36” x 80”, making it a compatible upgrade for all three International RH Series sleeper cab configurations.


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Mack Trucks

Mack Pinnacle

Mack Pinnacle

Common Mattress Sizes: Size B 39” x 80”

The Mack Pinnacle is a great sleeper truck for truck drivers who regularly travel long distances because it is specifically designed for heavy loads, steep grades, and long hauls. This truck comes in three configurations including a 48-inch flat top sleeper, a 70-inch stand up sleeper, and a day cab. The Pinnacle provides drivers with a whole new level of comfort having 35% more space than most other truck configurations. On top of the additional living space, you can use a sleeper control panel to control a sleeper stereo, interior lighting, and the HVAC system. The sleeper bunk in a Mack Pinnacle measures 38 inches wide and 80 inches long, which should comfortably accommodate a SleepDog® Size B mattress.

Mack Anthem

Mack Anthem

Common Mattress Sizes: Size D: Bunk 32” x 80” and Size B 39” x 80”

The Mack Anthem is available in three distinctive configurations: the 70-inch stand up sleeper, the 48-inch flat top sleeper, and a day cab. These three configurations can further be customized thanks to the ample sleeper storage area. Additionally, the Mack Anthem truck sleep space can be customized with a single bunk that features lower storage, a single bunk with full storage, or a double bunk with full storage. Both SleepDog® mattress models are available in multiple sizes that comfortably fit in a Mack Anthem, including 32” x 80”, Size D, and 36” x 80”, Size A.


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Peterbilt Trucks

Peterbilt 389

Peterbilt 389

Common Mattress Sizes: Size A 36" x 80" and Size C 42” x 80”

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 389 is most commonly equipped with a 36-inch by 80-inch mattress or a 42-inch by 80-inch mattress. 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. The SleepDog® mattress sizes that are most often compatible with the Peterbilt 389 are our 36” wide x 80” long, Size A or our 42” wide x 80” long, Size C.

Peterbilt Model 389X

Peterbilt Model 389X

Common Mattress Sizes: Size C 42” x 80”

A limited time addition to the Peterbilt fleet, the Model 389X celebrates the original Model 389 with exclusive features both inside and out. Most notably, chrome details and bright exterior LED lighting make the 389X stand out. Available in a day cab or two different sleeper configurations, 72” and 78”, the 389X is the epitome of class and comfort. The 389X comes with ample storage space and the most sizable truck mattress sizes, 42” wide x 80” long. The SleepDog® mattress size that is generally compatible with the Peterbilt 389X is our Size C mattresses, measuring 42” x 80”, however, we always suggest measuring the sleeper berth to ensure any mattress upgrade is a suitable fit.

Peterbilt 567

Peterbilt 567

Common Mattress Sizes: Size C 42” x 80”

The Peterbilt 567 is a perfect fit for truck drivers who frequently travel long distances. With its durable steel frame and cast aluminum cross members, this sleeper truck is built for the heaviest and toughest jobs. The Peterbilt 567 sleeper environment is truly a home away from home. It was designed with luxury and comfort in mind. The sleeper cab is available in the following lengths: 44”, 58”, 72”, and 80”. The Peterbilt 567 80” sleeper can accommodate a mattress that is 42” wide x 80” long, while the smallest 44” sleeper cab option is most commonly furnished with a 31” wide x 80” long mattress. Because the 567 is available in a number of different cab configurations, we always suggest measuring your current mattress or your sleeper berth before upgrading, but the SleepDog® mattress sizes that are most compatible with the Peterbilt 567 models are our Size D mattress, measuring 32” x 80” and exclusively available in our BigDawg® mattress model, or our Size C mattresses, measuring 42” x 80”.

Peterbilt Model 579

Peterbilt Model 579

Common Mattress Sizes: Size A 36" x 80" and Size C 42” x 80”

The Peterbilt 579 has all of the features you might expect in a well-rated sleeper and is designed as a generously sized cabin for maximum productivity and comfort. The 579 comes in various spacious and ergonomic configurations, such as 44-inch, 58-inch, 72-inch, or 80-inch detachable sleepers. Depending on the square footage of your cabin, your bunk may even have the option of a useful swivel mount designed to hold a flat screen TV. However, the 579 is most commonly equipped with a 36-inch by 80-inch mattress or a 42-inch by 80-inch mattress. While we always recommend measuring the sleeper berth and current mattress(es) before buying a replacement mattress to ensure a perfect fit, the SleepDog® mattress sizes that are most often compatible with the Peterbilt 579 include our 36” wide x 80” long, Size A or our 42” wide x 80” long, Size C.

Peterbilt Model 589

Peterbilt Model 589

Common Mattress Sizes: Size A 36" x 80" and Size C 42” x 80”

The new Peterbilt Model 589 maintains the traditional style of Peterbilt trucks, while adding new, innovative designs and concepts. With features that include LED daytime running lights for extra safety and a 15” digital display, the Model 589 ensures an industry-leading experience while on the road. Available in both day cab and sleeper cab options, the Peterbilt Model 589 is designed for comfort and luxury. You can choose from the following six different sleeper configurations: 44” low roof, 58” low roof, 58” high roof, 72” low roof, 72” high roof or 80” high roof. The Model 589 sleepers also have options for single or double bunks, so depending on your sleeper cab configuration, your truck will likely come stocked with either a 36” x 80” mattress, compatible with a Size A SleepDog® or BigDawg® mattress, or a 42” x 80” mattress, which is compatible with a Size C SleepDog® or BigDawg. However, it’s always important to measure your sleep space before swapping your truck mattress to ensure it will fit properly.


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Frequently Asked Questions


How big is the sleeper in a big rig?

Sleeper sizes vary from truck to truck. Sleepers can range from under four feet in length to more than six feet, and are located behind the day cab. Regardless of the size of your rig, SleepDog® offers four standard replacement semi-truck mattress sizes to meet your sleep needs.

Can a driver split his sleep in the USA?

Yes, truck drivers can split their sleep in the USA. The FMCSA added a split sleeper rule in order to give drivers the flexibility to safely maximize their time and efficiency on the road. Drivers who choose to split their sleep must spend at least eight hours in the sleeper berth in total. They can split their time sleep time between two different time periods, but neither of those sleep times can equal less than two hours.

How many miles can a semi drive in a day?

While different trucking companies set different distance requirements and goals for their drivers, semi-truck drivers drive an average of 480 miles each day, assuming an average driving speed of 60 miles per hour. Federal agencies over the trucking industry have mandated that drivers can drive a maximum of 11 hours in a 14-hour window. Within this time frame, they are required to take at least one 30-minute break every eight hours.
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