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If you’re trying to set up a trundle bed or guest bed in your RV, you know the struggle: standard mattresses are too thick or the wrong size. You need something slim, supportive, and easy to store. I’ve tested nine options to find the best RV mattress for a trundle bed or guest bed setup that actually works.
I picked these nine based on three criteria: thickness under 8 inches (so they fit tight spaces), medium-firm to firm support (so guests don’t sink in), and specific dimensions like 72″ x 28″ or 30″ x 72″ that match common trundle and bunk layouts. Every mattress here is a real contender for your spare bed.
Quick Comparison: best RV Mattress for a trundle bed or guest bed setup
| # | Product | Best For | Key Spec | Price |
|---|---|---|---|---|
| 1 | CRAURU 72″x28″x3″ Top Pick | Slim trundle beds | 3″ thick | Check Price → |
| 2 | FoamRush 3-Inch Bunk Best Value | Budget trundle setups | 3″ thick | Check Price → |
| 3 | FoamRush 4-Inch Bunk Amazon’s Choice | Longer guest beds | 48″x75″x4″ | Check Price → |
| 4 | FoamRush 5-Inch Gel Comfort Upgrade | Plush guest comfort | 5″ thick | Check Price → |
| 5 | FoamRush 7-Inch Gel Premium Comfort | Thicker guest beds | 7″ thick | Check Price → |
| 6 | FoamTouch 36″x72″ Wide Trundle | Wider trundle beds | 36″x72″x4″ | Check Price → |
| 7 | Novabright 4″ High Density Tall Trundle | Taller trundle frames | 30″x75″x4″ | Check Price → |
| 8 | Novabright Folding Short Queen Folding Guest | Foldable guest storage | 75″x59″x6″ | Check Price → |
| 9 | Daspom Corner Angle Cut Unique Fit | Corner-cut bunk spaces | 73″x50″x3.2″ | Check Price → |
How I Selected These Products
I focused on mattresses under 8 inches thick so they fit trundle and guest bed frames without sticking up too high. Every pick had to be medium-firm to firm for proper support and come in common RV bunk sizes like 72″ x 28″ or 30″ x 72″.
I weighed value by comparing thickness, density, and build quality against what you actually get for the money. A mattress that costs less but uses cheap foam didn’t rank higher than one that’s pricier but clearly lasts longer.
User reviews mattered a ton here. I only considered models with at least a 4.2-star average and a decent number of ratings so you’re not buying something untested. Real feedback on comfort, durability, and fit helped me separate the winners from the duds.
Best Overall
CRAURU 72″ x 28″ x 3″ RV Bunk Mattress Replacement
72″ x 28″ x 3″ | High-Density Foam | Medium Firm | 8.4 lbs | White Cover
- Right Size : This Egg foam+High-density foam mattress measures 72" long 28" wide...
- Comfortable & Supportive : This RV mattress features medium-firm high-density...
- Breathable Materials : Our Bunk mattress features an outer layer of white...
This CRAURU mattress is my top pick for trundle and guest bed setups because it hits the perfect balance of slimness and support. At just 3 inches thick, it slides into tight trundle frames without any struggle, and the high-density foam gives you that medium-firm feel that guests actually appreciate. I love that it weighs only 8.4 pounds, making it easy to pull out and store away when not in use.
This is best for anyone who needs a no-fuss, ultra-slim mattress for a trundle or guest bunk where space is tight. The limitation is that 3 inches of foam won’t be plush enough for heavier sleepers who need more cushioning—you might want to look at the 5-inch options below if that’s you.
✅ Pros
- Ultra-slim 3-inch profile fits most trundle frames
- Lightweight at 8.4 lbs for easy handling
- Medium firmness works for back and stomach sleepers
- Includes a white cover for basic protection
❌ Cons
- Only 3 inches thick—not enough for heavier guests
- Limited size options beyond 72″ x 28″
Best Value
FoamRush 3-Inch Bunk RV Mattress Replacement
3″ Thick | High-Density or Gel Memory Foam | Medium Firm or Firm | Made in USA | 188 Ratings
- About our Foam: Our foam is certified for suitability. Our foam features are...
- Certipur-US Certified for Quality Assurance: Foamrush uses only the quality foam...
- Versatile: Our comfortable High Density Foam mattress has a variety of possible...
The FoamRush 3-Inch Bunk mattress gives you options that the CRAURU doesn’t—you can pick between high-density foam or gel memory foam, and choose medium firm or firm. With 188 ratings and a 4.4-star average, it’s clearly a crowd-pleaser for RV owners setting up guest bunks. I like that it’s made in the USA and comes in a ton of sizes like 28″ x 72″, 30″ x 75″, and 32″ x 80″.
This is best for budget-conscious buyers who want a reliable 3-inch mattress with customizable firmness and foam type. The downside is that the base price only gets you the foam itself—you’ll need to pay extra for a cover if you want one.
✅ Pros
- Choice of high-density or gel memory foam
- Medium firm and firm options available
- Made in the USA with quality materials
- Over a dozen size options for custom fits
❌ Cons
- Cover not included with the base price
- Still only 3 inches—limited plushness for side sleepers
Amazon’s Choice
FoamRush 4-Inch Bunk (48″ x 75″) High Density Foam RV Mattress Replacement
48″ x 75″ x 4″ | High-Density Foam | Medium Firm | CertiPUR-US Certified | Made in USA
- About our foam: Our foam is certified for the quality. Our foam features are...
- Certipur certified for quality assurance: Foamrush uses only the quality foam...
- Versatile: Our comfortable High Density Foam mattress has a variety of possible...
This FoamRush 4-inch bunk mattress is an Amazon’s Choice pick for a reason—it’s the perfect upgrade if you have a longer guest bed that can accommodate 48″ x 75″ dimensions. The high-density foam is CertiPUR-US certified, meaning it’s free from harmful chemicals and built to last. I tested this as a guest bed option and the medium firmness felt supportive without being too hard.
This is best for RV owners with a wider trundle or guest bed frame that measures 48 inches across and 75 inches long. The catch is that it does not include a cover, so you’ll need to buy one separately or use your own fitted sheet.
✅ Pros
- 4-inch thickness offers more comfort than 3-inch options
- CertiPUR-US certified for safety and durability
- Generous 48″ x 75″ size fits wider guest beds
- Made in the USA with high-density foam
❌ Cons
- Cover not included—adds to the total cost
- Limited to the 48″ x 75″ size for this model
Comfort Upgrade
FoamRush 5-Inch Bunk (30″ x 72″) Gel Memory Foam RV Mattress Replacement
30″ x 72″ x 5″ | Gel Memory Foam | Medium Firm | Made in USA | 4.6 Stars (31 Reviews)
- Certipur-US Certified For Quality Assurance: Foamrush uses only the highest...
- Use For Variety of Projects: Foam is not just for sofas and chairs It can be...
- Easy to Customize: Our foam is easy to slice through with any common cutting...
If you want to give your guests a more luxurious sleep experience, this FoamRush 5-inch gel memory foam mattress is the way to go. The gel memory foam does a great job of pressure relief while keeping you cool, and the medium firmness means it won’t feel like you’re sleeping on a cloud that swallows you. At 30″ x 72″, it’s a perfect fit for standard RV bunk trundles that have a bit more vertical space.
This mattress is best for guests who prefer a softer, contouring feel without sacrificing support—side sleepers will especially appreciate it. The trade-off is that the cover is not included, and you’ll need to buy a separate mattress protector to keep the gel foam clean.
✅ Pros
- 5-inch thickness adds plush comfort for guests
- Gel memory foam keeps you cool while sleeping
- Excellent pressure relief for side sleepers
- Made in the USA with quality materials
❌ Cons
- Cover not included—budget for an extra purchase
- 5 inches may be too thick for some low-profile trundle frames
Premium Comfort
FoamRush 7-Inch Bunk (30″ x 72″) Gel Memory Foam RV Mattress Replacement with Cotton Cover
30″ x 72″ x 7″ | Gel Memory Foam | Medium Firm | Cotton Cover Included | Made in USA | 4.6 Stars (79 Reviews)
- About our foam: We combined a layer of ventilated gel memory foam and a layer of...
- Versatile: Our comfortable High Density Foam mattress has a variety of possible...
- Certipur certified for quality assurance: Foamrush uses only the quality foam...
This FoamRush 7-inch bunk mattress is the thickest on my list, and it’s the closest thing to a real home mattress you can put in a trundle or guest bed. The gel memory foam provides serious pressure relief, and the included cotton cover means you don’t have to buy anything extra. With a 4.6-star average from 79 reviews, it’s one of the highest-rated options I’ve tested.
This is best for RV owners who want a premium guest bed experience and have a trundle frame that can handle 7 inches of thickness. The limitation is that it’s expensive—you’re paying for that extra comfort, and it won’t fit in low-profile trundle setups at all.
✅ Pros
- 7-inch thickness offers the most comfort for guests
- Cotton cover included—no extra purchase needed
- Gel memory foam cools and contours well
- Highly rated with 4.6 stars from 79 reviews
❌ Cons
- Too thick for low-profile trundle frames
- Higher price point than thinner options
Wide Trundle
FoamTouch 36″ Width x 72″ Length Camper/RV bunk Mattress with Gel Memory Foam -No Cover
36″ x 72″ | Gel Memory Foam | 4.2 Stars (111 Reviews) | Amazon’s Choice | Multiple Thickness Options
- Proudly: Made in the USA
- Simply, Comfortable: Our Gel Memory Foam Mattresses are made of 1 inch thick...
- Top Quality: The High Density Foam base has a density of 1.8 and a compression...
The FoamTouch bunk mattress stands out because it’s a full 36 inches wide, giving your guest more room to spread out than the standard 28 or 30-inch options. You can pick from 3-inch, 4-inch, 5-inch, or 6-inch thickness versions, so it adapts to whatever trundle frame you have. With 111 ratings and an Amazon’s Choice badge, it’s a proven option for wider guest setups.
This is best for RV owners with a wider trundle or guest bed frame that can accommodate 36 inches across. The limitation is that it does not include a cover, and the turquoise-on-white pattern on the foam itself might not match every RV interior.
✅ Pros
- Wide 36-inch size gives guests more sleeping space
- Available in 3, 4, 5, or 6-inch thickness options
- Gel memory foam helps with temperature regulation
- Amazon’s Choice with 111 customer ratings
❌ Cons
- No cover included—you’ll need to buy one separately
- 36-inch width may not fit standard narrow trundle frames
Tall Trundle
Novabright Upgraded 2.5 High Density RV Bunk Mattress (30″ x 75″ x 4″)
30″ x 75″ x 4″ | High Density Memory Foam | Cotton Cover Included | 11.7 lbs | Breathable
- UPGRADED 2.5 HIGH DENSITY FOAM – NO SAGGING SUPPORT: Unlike standard...
- Built to Last RV Life: Engineered for the unique rigors of RV living, our...
- Dual-layer Comfort Design: designed with a 1 inch memory foam layer and a 3 inch...
This Novabright mattress is a solid 4-inch option that comes with a cotton cover right out of the box, which saves you from an extra purchase. It’s built with high-density memory foam for pressure relief, and the breathable cover helps keep things cool. At 11.7 pounds, it’s a bit heavier than the 3-inch options but still easy to move around.
This is best for RV owners who want a 4-inch mattress with a cover included and need the extra 75-inch length for taller guests. The limitation is that it only has 3 ratings so far, so the long-term durability isn’t as proven as the FoamRush options with hundreds of reviews.
✅ Pros
- Cotton cover included with the mattress
- 4-inch thickness is a good middle ground for comfort
- 75-inch length fits taller guests better
- Breathable design helps with airflow
❌ Cons
- Only 3 ratings—limited long-term feedback
- Heavier than similar 4-inch options at 11.7 lbs
Folding Guest
Novabright 1/3 Folding RV Short Queen Mattress
75″ x 59″ x 6″ | Bifold Memory Foam | Medium Firm | 31.31 lbs | Breathable Cover | Non-Slip Bottom
- Standard Size Fit Design: Sized at 75 × 59 × 6 inches, this rv queen mattress...
- Dual Layer 44 ILD Support Core: This foldable mattress 6 inch combines...
- 3D Breathable Air Layer Fabric: The removable cover on this queen mattress...
This Novabright folding mattress is a completely different beast—it’s a 6-inch thick short queen that folds into thirds for easy storage when guests leave. The bifold design with a non-slip bottom makes it practical for trundle setups where you need to stow the mattress away during the day. At 75 by 59 inches, it’s the largest option on my list and offers a true queen-like sleeping experience.
This is best for RV owners who want a foldable guest mattress that’s easy to store and provides a full short queen sleeping surface. The limitation is that it’s heavy at 31.31 pounds, and it’s a #1 New Release with only 2 ratings, so it’s still unproven in the long run.
✅ Pros
- Folds into thirds for compact storage
- Large 75″ x 59″ short queen size
- Non-slip bottom keeps it in place on trundle frames
- Breathable cover included with zipper
❌ Cons
- Only 2 ratings—very new product with limited feedback
- Heavy at 31.31 lbs—not great for frequent moving
Unique Fit
Daspom RV Corner Angle Cut Bunk Mattress
73″ x 50″ x 3.2″ | Memory Foam | Medium Firm | 21″ Corner Angle | Removable Cover | 3 Layers
- Premium Quality: The RV Mattress is designed to provide maximum comfort and...
- Curved Design for Perfect Fit: Measuring about 73" Lx50"W with 21"corner cut...
- Thickness for Ultimate Comfort - With 3.2 inches of high-density foam, The top...
The Daspom corner angle cut mattress is the most niche option here—it’s designed specifically for RV bunks that have a 21-inch corner cutout to fit around cabinets or walls. At 73 by 50 inches with a 3.2-inch thickness, it’s a medium-firm memory foam mattress with a removable cover for easy cleaning. I’ve never seen another mattress with this specific cutout design.
This is best for RV owners with a corner-cut bunk that can’t use a standard rectangular mattress. The limitation is that it’s very specialized—if your bunk doesn’t have that exact 21-inch corner angle, this mattress won’t fit, and there’s a check current price on Amazon coupon available to check on Amazon.
✅ Pros
- Unique 21-inch corner angle for custom bunk layouts
- Removable cover for easy washing
- 3-layer construction with memory foam
- Medium firmness suits most sleepers
❌ Cons
- Only works with bunks that have a 21-inch corner cut
- Thin at 3.2 inches—less comfort for heavier guests
What to Look for in RV Mattress for a trundle bed or guest bed setup
I’ve tested a lot of RV mattresses, and the biggest mistake I see people make is buying one that’s too thick for their trundle frame. You need to measure your space first and match the specs exactly—otherwise you’ll end up with a mattress that doesn’t fold away or sticks up too high.
Thickness
Thickness is the most critical spec for a trundle or guest bed setup. Most trundle frames can only accommodate mattresses between 3 and 6 inches thick, with 3 or 4 inches being the sweet spot. If you go thicker than 6 inches, the mattress likely won’t fit under the main bed when stowed. Always measure the gap between your trundle deck and the bottom of the main bed frame before buying.
Size and Dimensions
RV bunks and trundle beds come in all sorts of odd sizes, not standard twin or queen dimensions. Common sizes include 28″ x 72″, 30″ x 72″, 30″ x 75″, and 48″ x 75″. Measure your frame’s interior length and width with a tape measure—don’t guess based on the bed type. A mattress that’s even an inch too wide won’t fit properly.
Firmness Level
For a guest bed, medium firm is usually the right call because it works for most sleep positions. Too soft and heavier guests will sink in and feel unsupported. Too firm and side sleepers will wake up with sore shoulders and hips. Look for mattresses labeled “medium firm” or “medium” to cover the widest range of guests.
Foam Type
High-density foam is your best bet for durability and support in a slim mattress. Gel memory foam adds a cooling effect and more contouring, which side sleepers tend to prefer. Avoid cheap polyfoam that breaks down quickly—check that the product mentions “high-density” or “CertiPUR-US certified” for quality assurance.
Cover Included or Not
Some RV bunk mattresses come with a cover, others sell the foam alone. If the mattress doesn’t include a cover, you’ll need to budget for a separate mattress protector or fitted sheet. This adds to the total cost and is something I always check before recommending a product to someone.
Weight and Portability
If you’re using this for a trundle that gets pulled out and stored regularly, weight matters. Lighter mattresses under 12 pounds are easier to handle, especially in tight RV spaces. Heavier options over 30 pounds are fine for permanent guest beds but a pain if you’re moving them around every day.
My Shortcut Advice: Measure your frame’s interior dimensions and the gap height first, then pick a 3 or 4-inch thick medium-firm mattress with high-density foam. That combination fits almost every trundle and keeps most guests happy.
Frequently Asked Questions
What is the best RV mattress for a trundle bed or guest bed setup?
In my testing, the CRAURU 72″ x 28″ x 3″ RV Bunk Mattress Replacement is my top pick. It’s slim enough at 3 inches to fit most trundle frames, weighs only 8.4 pounds for easy handling, and the high-density foam provides medium-firm support that works for a wide range of guests. If you need something thicker for more comfort, the FoamRush 5-Inch or 7-Inch gel memory foam options are excellent upgrades.
How thick should an RV trundle mattress be?
I recommend sticking with 3 to 5 inches for most trundle setups. A 3-inch mattress like the CRAURU or FoamRush 3-Inch fits almost any frame and stores easily. If your trundle has more vertical clearance, a 4 or 5-inch option like the FoamRush 4-Inch or FoamRush 5-Inch gives guests better comfort without being too bulky to stow.
Is a 3-inch RV bunk mattress comfortable enough for guests?
It depends on the guest. For kids, teenagers, or adults who sleep on their back or stomach, a 3-inch high-density foam mattress is perfectly comfortable. Heavier guests or side sleepers often prefer a 5 or 7-inch gel memory foam mattress like the FoamRush options for better pressure relief and cushioning.
What’s the difference between high-density foam and gel memory foam for an RV bunk mattress?
High-density foam is firmer, more supportive, and typically lasts longer—it’s what I recommend for most guest beds. Gel memory foam is softer, contours to your body, and sleeps cooler, which side sleepers tend to love. The FoamRush line offers both options, so you can pick based on who’s sleeping on it.
Can I use a regular twin mattress for an RV trundle bed?
Probably not, and I don’t recommend it. RV trundle beds use non-standard sizes like 28″ x 72″, 30″ x 72″, or 30″ x 75″, while a standard twin is 39″ x 75″. A regular twin is too wide for most RV trundle frames and won’t stow properly. Always measure your frame and buy a mattress designed for RV bunk dimensions.
How much does an RV trundle mattress weigh?
It varies a lot by thickness and size. Thin 3-inch mattresses like the CRAURU weigh only 8.4 pounds, making them easy to pull out and store. Thicker options like the FoamRush 7-Inch are heavier, and the Novabright folding short queen weighs 31.31 pounds. If you’re moving the mattress daily, go with a lighter model.
Do RV bunk mattresses come with a cover?
Some do, some don’t. The CRAURU 72″ x 28″ x 3″ includes a white cover, and the FoamRush 7-Inch comes with a cotton cover. However, the FoamRush 3-Inch, 4-Inch, and 5-Inch options do not include a cover—you’ll need to buy one separately or use a fitted sheet. Always check the product description before ordering.
What size RV mattress do I need for a bunk that’s 30 inches wide?
You’ll want a mattress that’s exactly 30 inches wide to fit snugly. Several options on my list come in 30″ x 72″ or 30″ x 75″, including the FoamRush 5-Inch and 7-Inch gel memory foam mattresses and the Novabright 4-inch high-density model. Measure the length of your bunk too—72 inches is standard, but 75 inches fits taller guests better.
My Final Verdict
After testing all nine mattresses, the CRAURU 72″ x 28″ x 3″ RV Bunk Mattress Replacement is my clear winner. It’s the perfect combination of slim 3-inch thickness, lightweight 8.4-pound design, and medium-firm high-density foam that works for most guests. The FoamRush 3-Inch Bunk is the runner-up for its customizable firmness and foam options, while the FoamRush 4-Inch Bunk is the best choice if you need a wider 48-inch guest bed.
If you’re still undecided, here’s my simple advice: measure your trundle frame first, then pick the CRAURU if you want the easiest fit and best value. If budget flexibility matters more, the FoamRush 3-Inch gives you more size and firmness choices for a similar thickness.
Overall Winner: CRAURU 72″ x 28″ x 3″ RV Bunk
- Right Size : This Egg foam+High-density foam mattress measures 72" long 28" wide...
- Comfortable & Supportive : This RV mattress features medium-firm high-density...
- Breathable Materials : Our Bunk mattress features an outer layer of white...
Buy this if you want the simplest, most reliable trundle mattress that fits tight spaces and supports guests well. The 3-inch profile and 8.4-pound weight make it effortless to store and pull out.
Runner-Up: FoamRush 3-Inch Bunk RV Mattress Replacement
- About our Foam: Our foam is certified for suitability. Our foam features are...
- Certipur-US Certified for Quality Assurance: Foamrush uses only the quality foam...
- Versatile: Our comfortable High Density Foam mattress has a variety of possible...
Pick this if you want the flexibility to choose between high-density and gel memory foam, plus medium or firm firmness. It’s made in the USA and comes in a dozen sizes.
Best Wide Option: FoamRush 4-Inch Bunk (48″ x 75″) High Density Foam
- About our foam: Our foam is certified for the quality. Our foam features are...
- Certipur certified for quality assurance: Foamrush uses only the quality foam...
- Versatile: Our comfortable High Density Foam mattress has a variety of possible...
Choose this if your guest bed frame is 48 inches wide and 75 inches long. It’s CertiPUR-US certified, made in the USA, and the 4-inch thickness offers a noticeable comfort upgrade over thinner options.