Choosing the right mattress for an RV is about more than softness. You need a custom fit, dependable support, and materials that hold up to travel, tight spaces, and changing temperatures.
This roundup highlights the best custom size RV memory foam mattress options for 2026, with choices for bunk beds, campers, van builds, and other hard-to-fit sleep spaces.
Best 10 Custom Size RV Memory Foam Mattress Picks for 2026
Custom-Fit Foam Support
High Density Foam Mattress for RV, Bed, or DIY Builds
- Custom sizes from 2" to 12" thick and up to 84" long
- Medium-firm or firm high-density foam with optional gel layer
- Machine washable zipper cover for easier cleaning
Best For: RV beds, daybeds, and DIY builds needing exact sizing
Made-to-Order RV Fit
Sydney Custom RV and Van Mattress
- Built to exact RV, van, or camper dimensions
- CertiPUR-US certified all-foam construction
- Optional 1.5" or 3" gel memory foam layer
Best For: DIY RV, van, and camper builds with exact sizing needs
Custom RV Bunk Comfort
Kogler Gel-Infused Memory Foam Mattress
- 34 x 75 x 6 size suits custom RV bunk layouts
- Gel memory foam over high-density support core
- Includes a standard foam pillow and compressed shipping
Best For: RV bunks and camper beds needing a wider custom-width fit
Corner-Cut Bunk Fit
Cozyway RV Bunk Memory Foam Mattress
- 22" corner cut helps it fit RV bunks cleanly
- Reversible design offers soft or firm comfort
- Water-resistant, stain-resistant cover for travel use
Best For: Corner-cut RV bunks and campers needing a snug fit
Custom Fit Foam Builder
FoammaUSA Custom Mattress and Topper
- Custom thickness, width, and length options
- Mid Firm or Firm foam with optional gel layer
- Water-resistant zippered cover choices
Best For: DIY RV and camper builds needing precise foam sizing
Road-Ready Cooling Comfort
Roam-M2 Custom Size Gel Memory Foam Mattress
- Custom-order-to-size RV mattress
- Medium feel with gel memory foam top layer
- CertiPUR-US certified foam, made in USA
Best For: Travelers wanting a medium-feel custom RV mattress with pressure relief
Compact RV Fit Set
Kogler 4" Gel-Infused Memory Foam Mattress
- 54 x 75 x 4 size for custom RV layouts
- Gel-infused memory foam over high-density base
- Vacuum-sealed and includes a foam pillow
Best For: Custom RV bunks and trailer beds needing a wider, shorter fit
Customizable Bunk Foam Pick
6-Inch Gel Foam 30x80 Bunk Mattress
- Ventilated gel memory foam plus support foam
- Can be trimmed, layered, or glued to size
- Made in the USA; cover not included
Best For: RV bunk beds and DIY camper mattress builds
Custom Fit Mattress Option
Adjustable Custom Size Foam Mattress
- Made to order in many lengths, widths, and thicknesses
- Choose organic beige or water-resistant grey cover
- High-density foam core with zipper and non-slip base
Best For: Exact-fit RV sleepers who want a covered mattress
Longer Bunk Foam Choice
7-Inch Gel Foam 30x72 Bunk Mattress
- Thicker 7-inch bunk mattress replacement
- Ventilated gel foam over high-density support foam
- Easy to cut, stack, or glue for custom sizing
Best For: Long RV bunks and thicker camper mattress builds
Custom-Fit Foam Support – High Density Foam Mattress for RV, Bed, or DIY Builds
If you need a custom size RV memory foam mattress that can be tailored to your exact space, this option focuses on fit, support, and easy care. You can choose from multiple thicknesses, widths, and lengths, plus add gel memory foam if you want a softer feel without giving up the structured base support.
Best For: RV owners, daybed setups, and DIY sleepers who want a made-to-size foam mattress with optional gel comfort.
Pros:
- Custom sizing spans 2″ to 12″ thick, 18″ to 80″ wide, and up to 84″ long
- High-density foam construction offers medium-firm or firm support
- Optional gel memory foam add-on adds contouring comfort
- Machine washable zipper cover makes upkeep easier
Cons:
- Core feel is built around support, so it may not suit sleepers wanting a very plush mattress
- Weight capacity is listed at 300 lbs maximum
- Gel memory foam is optional, not included in the base build
This is a practical pick if your priority is dialing in exact dimensions for an RV bed or other custom sleeping project. It is especially appealing for shoppers who want a supportive base with the option to add more pressure relief.
Made-to-Order RV Fit – Sydney Custom RV and Van Mattress
For a custom size RV memory foam mattress built to your exact layout, this made-to-order model is designed to eliminate trimming and awkward gaps. It uses an all-foam construction with an optional gel memory foam layer, so you can choose a firmer or more contouring feel depending on how you sleep on the road.
Best For: DIY RV, van, and camper builds that need exact dimensions and optional cooling comfort.
Pros:
- Made-to-order sizing is designed for a clean, professional fit
- CertiPUR-US certified foam with no ozone depleters or listed heavy metals
- Optional 1.5″ or 3″ gel memory foam layer for a softer feel
- Quilted breathable cover is designed to support airflow
Cons:
- Hand wash care is less convenient than a removable machine-washable cover
- All-foam design may feel firmer than some plush mattress shoppers want
- Gel memory foam comfort layer costs extra if added
This mattress stands out for buyers who want a made-in-USA custom fit without having to modify the bed themselves. The optional gel layer makes it flexible for sleepers who want either firmer support or a bit more pressure relief.
Custom RV Bunk Comfort – Kogler Gel-Infused Memory Foam Mattress
If you need a custom size RV memory foam mattress for a bunk or travel trailer bed, this Kogler option is built around a practical 34 x 75 size and a 6-inch profile. The gel-infused memory foam top and high-density base aim to balance contouring comfort with stable support, making it a straightforward choice for mobile sleeping spaces.
Best For: RV bunks, camper beds, and travel trailers that need a wider custom-width mattress with a shorter length.
Pros:
- Designed for custom RV bed layouts that need a nonstandard fit
- Gel-infused memory foam comfort layer over a high-density foam base
- Includes a standard foam pillow for a ready-to-use setup
- Ships compressed and rolls out more easily through narrow RV spaces
Cons:
- Only one listed size, so it is not a fully configurable custom mattress
- Cover is cloth, not a removable washable zipper style
- Medium-firm feel may not suit sleepers wanting a very soft bed
Overall, this is a focused fit-and-function option for RV owners who need a specific bunk-friendly size rather than a fully bespoke build. The included pillow and compressed shipping add convenience for fast setup on the road.
Corner-Cut Bunk Fit – Cozyway RV Bunk Memory Foam Mattress
When you need a custom size RV memory foam mattress that fits a bunk with an awkward corner cut, this Cozyway model is built for the job. Its 4-inch foam construction combines memory foam comfort with high-density support, and the reversible design lets you choose between a softer or firmer sleeping surface.
Best For: RV bunks and campers that need a corner-cut mattress with reversible comfort.
Pros:
- 22″ corner cut is designed for snug RV bunk fit
- Reversible design offers soft or firm sleeping surfaces
- Memory foam layer helps relieve pressure points
- Water-resistant and stain-resistant cover is practical for camper use
Cons:
- Not a fully made-to-order custom size mattress
- At 4″ thick, it is slimmer than many standard residential mattresses
- Firmness is described only as medium, so feel may vary by side
This is a strong fit-first option for RV bunk beds where corner clearance matters more than having a fully customized build. The reversible comfort and protective cover make it especially useful for travel and frequent use.
Custom Fit Foam Builder – FoammaUSA Custom Mattress and Topper
If you need a custom size RV memory foam mattress solution that can be tailored to unusual dimensions, this FoammaUSA option is built around flexibility. It offers custom thickness, width, and length choices, plus selectable firmness and an optional gel memory foam layer for added comfort.
Best For: DIY buyers, campers, and RV owners who need a made-to-measure foam mattress with cover and firmness choices.
Pros:
- Custom thickness from 2 to 12 inches, with widths from 18 to 84 inches and lengths from 48 to 96 inches
- Choice of Mid Firm or Firm polyurethane foam support
- Optional gel memory foam layer available in 1, 2, or 3 inches
- Water-resistant zippered cover options in Quilted or Navy
Cons:
- Slight size discrepancies of about 0.25 to 3 inches may occur
- Foam may need up to 72 hours to fully expand after unpacking
- Requires selecting multiple custom options at order time
Overall, this is a strong pick for shoppers who want broad sizing control and the ability to tune both feel and cover style. It is especially practical for custom RV builds and other projects where standard mattress sizes do not fit.
Road-Ready Cooling Comfort – Roam-M2 Custom Size Gel Memory Foam Mattress
For buyers searching for a custom size RV memory foam mattress with a more traditional mattress feel, the Roam-M2 focuses on medium comfort and pressure relief. Its gel memory foam surface is paired with a high-density base to help prevent oversinking while still offering contouring support for travel sleeping.
Best For: RV sleepers who want a medium-feel gel memory foam mattress made to size in the USA.
Pros:
- Custom-order-to-size format for RV and trailer layouts
- Medium feel with soft contouring on top
- Gel memory foam comfort layer over high-density support foam
- CertiPUR-US certified foam made in the USA
Cons:
- Limited to a medium firmness profile
- No extra cover or firmness customization options listed
- 10-inch depth may be too tall for some low-clearance bunks
This mattress makes sense if you want a balanced mix of cushioning and support rather than a highly configurable foam build. It is a straightforward choice for road use, especially if certified foam and pressure relief are priorities.
Compact RV Fit Set – Kogler 4" Gel-Infused Memory Foam Mattress
This Kogler model is a practical custom size RV memory foam mattress option for layouts that need a wider bed with a shorter length. At 54 x 75 inches and 4 inches thick, it pairs gel-infused memory foam with a high-density base for balanced comfort in compact RV spaces.
Best For: Camper and travel trailer owners who need a narrower, custom-fit mattress for bunks or shorter RV beds.
Pros:
- Designed for custom-width RV beds that fall between standard sizes
- Gel-infused memory foam comfort layer with a 2.0 lb high-density base
- Ships vacuum-sealed and rolled for easier handling in tight spaces
- Includes a standard foam pillow for a ready-to-use setup
Cons:
- Only listed in one size, 54 x 75 x 4 inches
- 4-inch profile may feel thin for some sleepers
- Firmness is described as medium firm, with no adjustment options
For RV owners who need a simple, space-conscious bed solution, this mattress is easy to evaluate and install. It is best suited to custom layouts where width matters more than maximum thickness.
Customizable Bunk Foam Pick – 6-Inch Gel Foam 30×80 Bunk Mattress
If you need a custom size RV memory foam mattress that can be trimmed to fit a bunk, camper, or trailer setup, this FoamRush option is built around flexibility. It combines ventilated gel memory foam with high-density support foam for a medium-firm feel, while the 30″ x 80″ x 6″ format makes it a practical starting point for narrow RV sleeping spaces.
Best For: RV bunk beds, campers, and DIY buyers who want a cut-to-fit foam mattress base without the cover.
Pros:
- Ventilated gel memory foam helps reduce heat buildup.
- High-density support foam adds pressure relief and structure.
- Easy to trim, stack, or glue for a custom fit.
- Made in the USA and sold as foam only for DIY flexibility.
Cons:
- Cover is not included.
- Only offered in one listed bunk size and thickness.
- Requires cutting or customization if your space differs from 30″ x 80″.
Overall, this is a strong choice if your priority is shaping a mattress to match an RV sleeping area rather than buying a finished, upholstered bed. The foam construction and customization-friendly design make it well suited to practical camper projects.
Custom Fit Mattress Option – Adjustable Custom Size Foam Mattress
For shoppers comparing a custom size RV memory foam mattress, this Matini Home model stands out because it is made to your dimensions and comes with cover choices to match different use cases. It can be configured in lengths from 36″ to 96″, widths from 24″ to 84″, and thicknesses from 3″ to 12″, making it a versatile option for RVs, vans, daybeds, and DIY furniture projects.
Best For: Buyers who need exact sizing plus a choice between a breathable organic cover and a water-resistant cover.
Pros:
- Custom dimensions cover a wide range of RV and specialty-bed sizes.
- High-density foam core is designed for support and spine alignment.
- Choice of organic beige or water-resistant grey cover.
- Includes a heavy-duty zipper and non-slip base.
Cons:
- Starting thickness is listed at 3 inches, which may be too thin for some sleepers.
- Foam construction is geared more toward support than plush softness.
- Customization adds decisions, so it is less simple than an off-the-shelf mattress.
This is a practical pick if you want a tailored fit and a more finished setup than foam-only options provide. The cover selection and broad size range make it especially useful when your RV bed dimensions are unusual or exact.
Longer Bunk Foam Choice – 7-Inch Gel Foam 30×72 Bunk Mattress
This custom size RV memory foam mattress replacement is a good fit when you need a longer bunk profile without moving up to a full finished mattress. FoamRush uses ventilated gel memory foam over high-density support foam to create a medium-firm feel, and the 30″ x 72″ x 7″ build gives you extra thickness for camper, trailer, or truck sleeping spaces.
Best For: RV bunk sleepers who want a longer, thicker foam replacement they can customize.
Pros:
- 7-inch thickness offers more height than many bunk foam options.
- Gel memory foam layer is ventilated for better airflow.
- Support foam base adds comfort and pressure relief.
- Can be cut, stacked, or glued to suit your space.
Cons:
- Cover is not included.
- Not water resistant.
- Only the listed 30″ x 72″ size is provided upfront.
Compared with thinner bunk inserts, this model gives you a bit more cushion and a more substantial feel. It is best for buyers who want a durable foam foundation and are comfortable customizing the final dimensions themselves.
How We Picked the Best Custom Size RV Memory Foam Mattress
We focused on custom sizing flexibility, foam quality, comfort level, cover durability, and whether each option makes sense for real RV use. That includes low-profile builds, bunk replacements, and thicker mattresses for primary sleeping areas.
We also looked at practical details like firmness options, gel-infused foam for temperature control, and features such as water-resistant or removable covers.
Quick Comparison
The best Custom Size RV Memory Foam Mattress for you depends on how the space is used. Thinner models are usually better for bunk areas and compact rigs, while 6- to 10-inch mattresses offer more pressure relief and a more home-like feel. If you sleep hot, look for gel-infused layers or breathable covers.
Key Buying Factors for a Custom Size RV Memory Foam Mattress
Fit and Dimensions
Measure carefully before ordering. RV beds often have cut corners, unusual widths, or shortened lengths, so even small errors can create gaps or fit issues.
Thickness and Support
Thicker foam generally improves comfort, but make sure it still works with overhead clearances, slide-outs, and fitted bedding. For primary beds, medium-firm support is often the best balance.
Temperature Regulation
Memory foam can trap heat, so gel infusion, cooling construction, and breathable covers are worth prioritizing if you travel in warm climates or sleep hot.
Cover Material and Maintenance
A removable or water-resistant cover can make life easier in an RV, where condensation, spills, and dust are common. Look for covers that are easy to clean and built for frequent use.
Who Should Buy What
If you need a bunk or space-saving replacement, choose a thinner mattress with reliable support. For full-time RV living or longer trips, a thicker Custom Size RV Memory Foam Mattress with gel or layered comfort is usually the better investment. DIY builders and van travelers may also want made-to-order options with exact sizing and firmness choices.
Shoppers who want the simplest upgrade should start with a straightforward medium-firm model. If comfort is the top priority, look for premium foam depth, temperature control features, and a cover that matches how you actually use your RV.