Buying guide · 10 min read · Updated October 2, 2026

5 Best Corner Cut RV Mattress in 2026: A Practical RV Guide

Five corner cut RV bunk mattresses compared by size, cut angle and foam thickness for angled bunks and odd shaped RV beds.

By Bowen HigginsRV Editor at RV Gear Lab5 products comparedSpec-sheet researched

Many travel trailers and fifth wheels have a bunk or a sleeping platform with one corner angled off, usually where the bed meets a wall, a wheel well or a door swing. A rectangular mattress will not sit flat there: it rides up on the angle, leaves a gap, or gets crushed against the wall. A corner cut mattress is made with a diagonal slice already taken off one corner so the bed sits flush.

Buying one is less simple than ordering a queen. Sizes cluster around 73 by 50 and 74 by 51 inches, the cut can be 21 or 22 inches along the diagonal, and the cut can be on the left or the right. Foam thickness ranges from about 2 inches to 8 inches, which changes both comfort and headroom in a bunk. Get the cut side or the measurements wrong and the mattress will not fit.

The five picks here cover the range: a thick 8 inch bed for daily adult use, a thinner 4 inch for guests and kids, a memory foam option with a washable cover, a right-corner model, and a custom-size mattress for odd bunks. The guide is organized by your bunk's shape and who sleeps there, and the tables below tie each case to a named product.

RV Gear Lab field notes

The Rig Fit Check

Start with the job: Camping World Cozyway RV Corner Cut Bunk Mattress leads this shortlist for Daily bunk sleepers needing a thick bed. Use that fit as a reference point, then compare the alternatives against your own space and workload.
Specs that separate the picks: The first details to compare are 8 inch foam, 51x74, 4 inch foam, 73x50, 3.2 inch foam, 74x51. Confirm the exact model and included components before ordering.
Trade-off to plan for: Eight inches may not clear

Before you buy

What Matters Before You Choose a Corner Cut RV Mattress

Key buying criteria so you get the right fit the first time.

01
Measure your bunk
Corner cut mattresses come in sizes from 73 by 50 to 74 by 51 inches, and a one inch difference leaves a gap or makes the foam buckle. Measure the platform length and width at the edges with a tape, not by memory. Compare your numbers with the stated dimensions on the product page before ordering, and add a note of any raised edges.
02
Cut angle and side
The diagonal cut can be 21 or 22 inches, and it may sit on the left or the right corner. Unlike a standard bed, a corner cut mattress cannot be flipped to fix the wrong side. Measure the length of the cut along the platform and note which corner it is on, then check the product details for both the cut length and the stated side.
03
Thickness and clearance
Bunks often have limited headroom under a ceiling, cabinet or the bed above. Even an extra inch can make the top sleeper feel cramped or cause a rub. Measure the gap between the platform and anything above it, then subtract the mattress thickness and leave room to sit up. Compare thickness in the title with your measurement before choosing, and note any lip or rail on the platform.
04
Foam type and feel
Memory foam contours to the body and holds heat, while high resiliency foam springs back quickly and sleeps cooler. Layered foam gives a soft top with a firmer base. Think about who sleeps there and the climate of your usual camps. Read the product page for the foam type and density language, such as 30D, before choosing a bunk mattress.
05
Washable cover option
Kids and pets make bunk covers dirty fast, and a zipper cover that goes in the washer saves you from replacing the whole mattress. A knitted cover may be more breathable but harder to remove. Check the product page for a removable cover and its care instructions, including washing temperature, before you buy for a bunk that sees daily use. Spares or a second cover are a smart addition for kids.
06
Custom versus stock sizing
Stock mattresses ship quickly and cost less, but they only fit bunks that match their stated size and cut. A custom mattress is cut to the measurements you send, which solves odd angles. Decide early which route your bunk requires, since a custom order involves accurate measuring, a longer wait and often no returns on cut foam. Ask the maker how long production takes before you order.

Our standards

Why You Can Trust RV Gear Lab

At RV Gear Lab, we compare products based on rig fit and power or hookup compatibility, verified specifications, usability, setup requirements, weight, durability, and real-world trade-offs. We do not rank products purely on marketing claims or commission rates.

We have not personally tested every product listed. Where hands-on testing is not available, recommendations are based on verified manufacturer specifications, product documentation, use-case fit, and comparative research.

How we review RV gear →

Detailed reviews

The 5 best corner cut rv mattress, explained

Best Overall · 1 of 5

Camping World Cozyway RV Corner Cut Bunk Mattress

8 inch foam, 51x74
Corner cut
CertiPUR-US certified foam

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Best for: Daily bunk sleepers needing a thick bed

Our take

It suits bunk sleepers wanting a thick bed: full-timers using a corner bunk as a main bed, a teenager or an adult who needs real support, and owners who want to replace a worn factory foam block.

Why it made the shortlist

The Cozyway 8 inch corner cut bunk is 51 by 74 inches with eight inches of Comfort Core foam. It is CertiPUR-US certified, so the foam meets published limits on certain chemicals and emissions, and it is built as a full replacement bed rather than a thin pad.

Against the Cozyway 4 Inch, it doubles the foam for support, which matters when an adult sleeps there every night and needs a base that resists bottoming out.

If you have the headroom for eight inches and want the most comfort in this guide, it is the strongest choice.

What works

Eight inches of foam for support
Corner cut for angled bunks
CertiPUR-US foam

Watch out for

Eight inches may not clear

Check price on Amazon

Best Mid Price · 2 of 5

Camping World Cozyway RV Corner Cut Bunk Mattress

4 inch foam, 73x50
Corner cut
CertiPUR-US certified foam

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Best for: Guest bunks and kids' sleeping areas

Our take

The strongest case for Camping World Cozyway RV Corner Cut Bunk Mattress is thinner profile fits tight bunks.

Why it made the shortlist

The Cozyway 4 inch corner cut is 73 by 50 inches with high resiliency foam. It is CertiPUR-US certified, and the four inch profile keeps the bed low enough for bunks that sit close to a ceiling or a cabinet.

Against Cozyway 8 Inch, it is thinner and cheaper, saving about $138 for a bed that still gives a firm, springy surface. High resiliency foam bounces back quickly and sleeps cooler than dense memory foam, which suits guests and kids who move around at night. Compared with the Daspom and Kistrba, it adds slightly more foam depth and comes from the same brand family as the top pick.

What works

Thinner profile fits tight bunks
CertiPUR-US foam

Watch out for

Thinner means less support
Smaller 73 by 50 size

The catch: If your bunk has limited headroom or you only need a solid sleeping surface for a few nights a month, it offers a smart balance of price and comfort.

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Best Memory Foam · 3 of 5

Daspom RV Corner Angle Cut Bunk Mattress

3.2 inch foam, 74x51
22 inch corner cut
Washable cover

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Best for: Washable bunk bed for families

Our take

It suits owners wanting a washable cover and memory foam feel on a bunk where the corner cut is about 22 inches.

Why it made the shortlist

The Daspom is 74 by 51 inches with a 22 inch corner cut and 3.2 inches of 30D memory foam. It has a removable washable cover, which is a practical feature in a bunk that kids, pets and travel dust reach quickly.

Next to Cozyway 4 Inch, it adds a memory foam top, so it contours to the body instead of bouncing back, and it brings a washable cover. The 74 by 51 inch size also matches a common bunk dimension.

Families with kids, owners who travel with pets, and anyone who wants an easy-to-clean sleeping surface will appreciate that the cover comes off and goes in the wash.

What works

Memory foam top contours
Removable machine washable cover
22 inch cut fits many bunks

Watch out for

Thin for adults
Cut may not match your bunk

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Best Cut Option · 4 of 5

Kistrba Corner Cut RV Mattress

74x51, 21-inch cut
3.2 inch two layer
Knitted cover

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Best for: Right corner bunks needing a flush fit

Our take

It suits right corner bunks where a 74 by 51 inch mattress with a 21 inch cut is the match.

Why it made the shortlist

The Kistrba is 74 by 51 inches with a 21 inch right corner cut. It uses two layers totalling 3.2 inches with a knitted cover, so the top layer adds softness while the base layer gives support and keeps the bed from feeling flat.

Compared with Daspom 74x51, it has a 21 inch cut at a lower price, about $20 less, and a breathable knitted cover in place of a removable washable one. Against the Cozyway 4 Inch, it trades a little thickness for a layered construction and a cut that is built for the right corner, which matters because mattress cuts are not reversible.

If you have measured your bunk and the cut falls on the right side, this mattress is a budget-friendly way to get a flush fit without ordering a custom size.

What works

Cut matched to right corner bunks
Breathable knitted cover

Watch out for

Right corner only
Thin foam

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Best Custom · 5 of 5

ZAQYCM Customized Medium Firm Foam Rv Angled Bunk Mattress 2/3/4 Inch Thick

Custom size
2, 3 or 4 inch
Medium firm

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Best for: Odd shaped bunks needing custom sizing

Our take

It suits odd shapes: bunks with a rounded corner, a long diagonal, a wheel well notch or dimensions that match no stock mattress.

Why it made the shortlist

The ZAQYCM is a medium firm foam angled bunk mattress available in 2, 3 or 4 inches. You send measurements for a custom size, and the maker cuts the foam to match your bunk, so unusual angles and non-standard dimensions are covered.

Compared with the Kistrba, it is made to your bunk rather than sold in a fixed 74 by 51 size, which removes the guesswork about cut angle and side. It also has the lowest price in this guide at $135.00 and the widest choice of thickness, from a slim 2 inches up to 4 inches, with a removable washable cover included.

What works

Custom size for odd bunks
Thickness options
Removable washable cover

Watch out for

Requires sending measurements
Longer wait than stock sizes

Check price on Amazon

Methodology

How We Built This Shortlist

Each pick was assessed across 4 criteria weighted for real-world use.

Size and dimensions

We compared the stated length and width of each mattress against the 73 by 50 and 74 by 51 inch bunks common in RVs. A one inch error leaves a gap or forces the mattress to buckle, so published dimensions carried real weight.

Corner cut angle and side

We compared the cut length, 21 or 22 inches, and whether it is made for the left or right corner. Based on published specs, a cut that does not match your bunk cannot be fixed after the mattress arrives.

Thickness and clearance

We compared foam depth from 2 inches up to 8 inches. Bunks often sit under cabinets or slides, so the thickest mattress is not always the best, and support for daily sleep has to be balanced against available headroom.

Value and cover design

We weighed price against foam depth, certification and cover design. Removable washable covers, knitted covers and CertiPUR-US foam all affect how long a bunk mattress stays comfortable and clean in a busy camper, so we counted them in value as well as price.

Decision guide

Match a Corner Cut RV Mattress to Your RV

By Bunk and Sleeper

Who sleeps in the bunk and how often decides how thick and how supportive it should be. Match the sleeper and the shape of the space to one of the named mattresses in this guide.

Your situation	Recommended pick	Why
Adult sleeping nightly with headroom to spare	Camping World Cozyway 8 Inch	Eight inches of foam gives full-time support and a real mattress feel.
Kids or occasional guests on a low bunk	Camping World Cozyway 4 Inch	A thin four inch profile keeps the bed low and the price modest.
Odd shaped bunk with a nonstandard angle	ZAQYCM Custom Angled	A custom size is cut to your measurements for a snug fit.
Right corner cut with a 74 by 51 inch platform	Kistrba 21 Inch Cut	A 21 inch right cut matches the corner without custom work.

By Budget

Prices run from $135.00 to $359.99, a wide spread. The money mostly buys foam depth and brand support, so decide how much of each you need before choosing.

Budget	Recommended pick	What you get
$130 to $140	ZAQYCM Custom Angled	At $135.00 you get a custom-size foam bunk in 2, 3 or 4 inches.
$205 to $215	Kistrba 21 Inch Cut	At $209.99 you get a layered 3.2 inch mattress with a 21 inch right cut.
$220 to $230	Camping World Cozyway 4 Inch or Daspom 74x51	At $221.99 or $229.99 you get 4 inch foam or a memory foam top with a washable cover.
$355 to $360	Camping World Cozyway 8 Inch	At $359.99 you get eight inches of CertiPUR-US certified foam.

Stock vs Custom

The main decision is whether a stock cut can fit your bunk. Stock mattresses ship fast and cost less, while a custom mattress solves odd shapes at the price of a wait.

Stock

Camping World Cozyway 8 Inch, Camping World Cozyway 4 Inch, Daspom 74x51 and Kistrba 21 Inch Cut are stock sizes. They ship ready to go, but require your bunk to match 73 by 50 or 74 by 51 inches and the stated cut.

Custom

ZAQYCM Custom Angled is cut from measurements you send, in 2, 3 or 4 inch thickness. It solves unusual angles and sizes, which stock mattresses cannot, though it needs accurate measuring and a longer wait than stock.

Most buyers should pick stock Daspom 74x51 unless the bunk is unusual.

By Foam and Cover Type

Foam and cover choices shape how the bed feels and how easy it is to keep clean. This is a different question from size, so consider it after you have confirmed the fit.

Preference	Recommended pick	Why it fits
Memory foam that contours with a washable cover	Daspom 74x51	A 30D memory foam top and a removable machine washable cover suit families.
Springy high resiliency foam that sleeps cooler	Camping World Cozyway 4 Inch	High resiliency foam bounces back and avoids the warm feel of dense foam.
Layered support with a breathable cover	Kistrba 21 Inch Cut	Two layers and a knitted cover add support and airflow at a lower price.
Medium firm feel in a choice of thickness	ZAQYCM Custom Angled	Medium firm foam comes in 2, 3 or 4 inches to suit the bunk.

For Kids Bunks Specifically

Kids' bunks need easy cleaning, modest height and a price that does not hurt when spills happen. Think about how tall the bunk is and how often a cover will need washing.

Look for

Look for a removable washable cover and a thin profile that leaves headroom. A 3 to 4 inch mattress keeps the surface a safe distance from the ceiling, and a cover that zips off makes spills a minor chore.

In this comparison

Daspom 74x51 has a removable machine washable cover and a memory foam top. Camping World Cozyway 4 Inch is thin and priced lower, and ZAQYCM Custom Angled also includes a washable cover.

When to Spend More

The gap between the cheapest and most expensive picks is over $220. Decide whether comfort and support for a nightly sleeper justify that, or whether an occasional bunk needs less.

Spend more if

Spend more on Camping World Cozyway 8 Inch if an adult sleeps there nightly. Eight inches of foam resists bottoming out and gives much better support than the 3.2 inch mattresses.

Save if

Save with Kistrba 21 Inch Cut or Daspom 74x51 for kids and occasional guests. Both cost about $130 less than the top pick and keep the bunk low, and a washable cover is easy to maintain.

FAQ

Before You Bring One Home

How do I know which corner of my bunk is cut?

Stand at the foot of the bunk and look at which corner of the platform is angled. Check the product details for left or right, then match it exactly, since a corner cut mattress cannot be flipped to fix the wrong side. If your bunk has a very unusual angle, a custom mattress is the safer option.

What is the most common mistake when buying a corner cut mattress?

Ordering without measuring the cut. People measure length and width, then discover the diagonal is 21 inches while the mattress has 22, or that the cut is on the wrong side. Measure the cut along both edges where it meets the platform, and write the numbers down before comparing them with each product.

Is a thicker bunk mattress worth it?

For adults who sleep there nightly, yes, because eight inches of foam resists bottoming out and gives real support. For kids or occasional guests, a 3 to 4 inch mattress is usually enough and keeps headroom. Measure clearance first, since a thick mattress that crowds the ceiling is a poor trade.

How do I wash a bunk mattress cover?

Remove the cover by its zipper, check the care label and wash it on a gentle cycle in cool water. Air dry it or use low heat, and make sure it is fully dry before putting it back. Do not soak the foam, and spot clean spills quickly with a mild cleaner.

Can I trim a mattress that is slightly too big?

Trimming foam is hard to do cleanly and can void any warranty, so it is better to buy the right size. A kitchen knife leaves ragged edges, and a cut through a layered mattress may weaken it. If your bunk is unusual, order a custom size such as the ZAQYCM instead of cutting.

How long should a new foam mattress air out?

Unroll it in a ventilated area and let it expand fully, which can take up to 48 hours for thicker foam. Open windows and run a fan to clear the new foam smell. Wait until it is flat before making the bed, since a mattress still compressing may feel uneven.

Bottom line

The short version

For a daily adult sleeper, the Camping World Cozyway 8 Inch corner cut bunk mattress is the best choice here. It gives eight inches of CertiPUR-US certified foam in a 51 by 74 inch size, which makes it feel like a full mattress. The Cozyway 4 Inch is the sensible pick for guests and kids who want a lower profile.

If you want memory foam and a washable cover, choose the Daspom. If your bunk has a right corner cut, look at the Kistrba, and if the bunk is truly odd shaped, order the ZAQYCM custom mattress. Whichever you choose, measure the cut and the side first.

Browse more corner cut rv mattress on Amazon →

About the author

Bowen Higgins

RV Editor at RV Gear Lab

Bowen covers RV power, water systems, towing and leveling, upkeep and interior comfort, with a focus on matching gear to the rig, the hookups and the way you actually travel.

5 Best Corner Cut RV Mattress in 2026: A Practical RV Guide

Our top picks

The Rig Fit Check

What Matters Before You Choose a Corner Cut RV Mattress

Measure your bunk

Cut angle and side

Thickness and clearance

Foam type and feel

Washable cover option

Custom versus stock sizing

Why You Can Trust RV Gear Lab

The 5 best corner cut rv mattress, explained

Camping World Cozyway RV Corner Cut Bunk Mattress

Camping World Cozyway RV Corner Cut Bunk Mattress

Daspom RV Corner Angle Cut Bunk Mattress

Kistrba Corner Cut RV Mattress

ZAQYCM Customized Medium Firm Foam Rv Angled Bunk Mattress 2/3/4 Inch Thick

How We Built This Shortlist

Size and dimensions

Corner cut angle and side

Thickness and clearance

Value and cover design

Match a Corner Cut RV Mattress to Your RV

By Bunk and Sleeper

By Budget

Stock vs Custom

By Foam and Cover Type

For Kids Bunks Specifically

When to Spend More

Before You Bring One Home

How do I know which corner of my bunk is cut?

What is the most common mistake when buying a corner cut mattress?

Is a thicker bunk mattress worth it?

How do I wash a bunk mattress cover?

Can I trim a mattress that is slightly too big?

How long should a new foam mattress air out?

The short version

Bowen Higgins

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