What Size Bed is in a Tractor Trailer?

Although most mattresses for semi-truck sleeper bunks measure around 80-inches long and 40-inches wide, there are a large number of semi-truck models with different mattress specifications which makes buying the correct mattress size surprisingly complicated. There are also many different retailers where you can buy a mattress for a tractor trailer sleeper, making it even easier to forget or harder to find the mattress specifications you need for your truck.

Another important factor to consider when buying a mattress for your truck is the potential for team driving. Since stricter federal guidelines for electronic logging were passed in 2018, team driving has been on the rise. Logistics companies and truck drivers have turned to team driving as a way to maintain delivery schedules and to keep their costs down. On long routes, it is common for one driver to sleep while the other drives, making a comfortable, well-fitted mattress a must have. This means that team drivers may have the additional challenge of finding the right size mattress for a top and bottom bunk configuration.

SleepDog Mattress Logo and Semi Truck on Highway

It is important to do your research to get the right mattresses for the bunk in your semi-truck sleeper. To help simplify that process, below you can find information and mattress size recommendations for a few of the most popular tractor trailer sleeper models:

Volvo VNL 860

The VNL 860 sleeper cabin a comfortable and 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 environment 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. The bunk requires a mattress that is 80-inches long by 39-inches wide.

Kenworth T680

The Kenworth T680 is an extremely popular sleeper model semi-truck. The T680 is touted as one of the most fuel-efficient trucks that also comes equipped with high level of luxury and comfort. The sleeper options for this model range from a 40-inch bunk up to a 76-inch high roof condo sleeper. While the 76-inch configuration is the most spacious, each configuration comes with a comfortable amount of space. For the T680, an 80-inch by 36-inch mattress is the best fit.

Peterbilt 579

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 many spacious and ergonomic configurations, such as 44-inch, 72-inch, or 80-inch detachable sleepers. The bunk in the 579 can hold up to an 82-inch mattress and offers a useful swiveling mount designed to hold a flat screen TV. The sleeper also comes packed with plenty of overhead storage. The Peterbilt sleeper semi-truck unit is available in a number of sizes with various storage, shelving, and bunk options. The best mattress size for the Peterbilt 579 measures 80-inches long by 42-inches wide.

Freightliner Cascadia®

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® also comes with a selection of high-top interiors, offering enough space for overhead storage or even a second bunk. The bunks in the Cascadia need an 80-inch by 38-inch mattress. 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 and amenities to outfit your unit.


SleepDog® Mattress makes it easy to find the right size mattress for your sleeper, whether you need it for a top or bottom bunk. Each of our mattress models are offered in multiple sizes, ensuring that you get the right fit for your sleeper. We just launched a new size in our BigDawg mattress™ model, designed specifically for top bunk configurations. If you still have questions about which mattress is the best fit for your semi-truck sleeper, a SleepDog® mattress Customer Service Specialist would be happy to assist you.