Best 48-Inch-Wide Mattresses for RVs, Campers, and Custom Beds
The best 48-inch-wide mattress depends on the bed’s exact length and the thickness or feel you need. For a 48-by-75-inch bed, consider the Excel Sleep medium-firm memory foam mattress or a firm Foamma or FoamRush replacement. For a 48-by-72-inch space, the Kogler includes a cloth cover and pillow, while the Excel Sleep offers an 8-inch profile. Measure your mattress platform before choosing: these options differ in length, thickness, construction, and whether a cover is included.
| Product | Size | Best For |
|---|---|---|
| Excel Sleep Green Tea Memory Foam | 48 x 75 x 8 in. | Medium-firm comfort |
| Foamma Firm Foam | 48 x 75 x 4 in. | Simple firm replacement |
| FoamRush High-Density Foam | 48 x 75 x 4 in. | Firm, versatile foam |
| Kogler Gel Memory Foam | 48 x 72 x 6 in. | Covered mattress with pillow |
| FoamRush Gel Memory Foam | 48 x 80 x 4 in. | Longer bunk mattress |
Excel Sleep 8-Inch Green Tea Mattress
This 48-by-75-inch mattress is best for buyers who want a thicker, medium-firm foam option rather than a thin replacement pad. Excel Sleep describes its foam as zoned for pressure relief and infused with green tea for freshness. The listed foams and fabrics are CertiPUR-US certified.
Why it was selected: Its 75-inch length matches a common compact RV or custom-bed footprint, and its 8-inch thickness gives it a different profile from the 3- to 5-inch replacement foams in this selection. Consideration: Check available clearance and bedding fit before choosing an 8-inch mattress.
Foamma 4-Inch Firm Foam Mattress
Choose this Foamma mattress if you need a firm, 48-by-75-inch foam replacement for an RV bunk, camper, truck, or travel trailer. The manufacturer lists high-density foam with a density of 1.8 and a compression rate of 44 pounds. It is made in the USA and described as CertiPUR-US certified.
Why it was selected: Its firm, 4-inch construction suits buyers replacing a thinner mattress or foam insert. Consideration: The cover is not included, so plan for a separate cover or suitable existing mattress cover.
FoamRush 4-Inch High-Density Foam
This 48-by-75-inch FoamRush option is best for shoppers seeking firm, high-density foam for an RV, camper, trailer, or other listed uses such as a sleeper sofa or futon. Its listed specifications include density 1.8 and compression 44 ILD. The manufacturer also states that the foam is made in the USA and CertiPUR-US certified.
Why it was selected: It provides a firm 4-inch alternative at the same footprint as the Foamma model, making thickness and construction easier to compare. Consideration: The cover is not included.
Kogler 6-Inch Gel Memory Foam Mattress
The Kogler is best for buyers whose sleeping platform measures 48 by 72 inches and who want a finished mattress rather than a bare foam slab. It has a gel-infused memory foam comfort layer, a 2.0-pound-density foam base, and a gray cloth cover. One standard pillow is included.
Why it was selected: The included cover and pillow distinguish it from replacement foams sold without covers. Consideration: Its 72-inch length is 3 inches shorter than the 48-by-75-inch choices, so verify the platform dimensions before ordering.
FoamRush 4-Inch Gel Foam Mattress
This FoamRush model is best for a 48-by-80-inch sleeping space that needs a 4-inch mattress. Its construction combines ventilated gel memory foam with high-density support foam, and the listed feel is medium. The product information says the foam can be trimmed or layered for certain custom projects.
Why it was selected: It gives buyers with a longer-than-75-inch platform a gel-memory-foam alternative. Consideration: At 80 inches long, it may not fit a shorter RV bunk without trimming; the cover is not included.
Buying Guide: How to Choose a 48-Inch-Wide Mattress
What length should you buy?
“48 inches wide” describes only one dimension. Measure the platform from side to side and from head to foot, then compare both measurements with the listed mattress size. The products here range from 72 to 80 inches long. A mattress that is too long may need modification, while a shorter mattress can leave an uncovered gap.
How much thickness do you need?
Compare mattress thickness with available space, including any surrounding ledges, cabinets, or bedding. The options listed range from 4 to 8 inches. A thinner replacement can suit a low-clearance bunk, while a thicker mattress may better match a platform designed for more height. Confirm clearance rather than assuming a particular thickness will fit.
Should you choose firm foam or memory foam?
Firm high-density foam is a direct replacement-style choice, with the Foamma and FoamRush 4-inch models offering firm options. Memory foam or gel memory foam provides a different surface feel; the Excel Sleep is medium firm, while the Kogler combines a memory foam layer with a high-density base. Compare the stated feel and construction with your preference.
Does the mattress come with a cover?
Check the listing details before buying. The Foamma and FoamRush replacement models described here state that a cover is not included. Kogler lists a cloth cover and one standard pillow. Also check whether your existing cover will fit the mattress’s exact length and thickness.
Frequently Asked Questions
Is a 48-inch-wide mattress the same as a full-size mattress?
Not necessarily. These products are 48 inches wide, but their lengths and thicknesses vary. Use the exact measurements rather than relying on a general size label.
Which listed mattress is 48 by 75 inches?
The Excel Sleep 8-inch mattress, Foamma 4-inch foam mattress, and FoamRush 4-inch high-density foam mattress are listed at 48 by 75 inches.
Which option includes a cover?
The Kogler 48-by-72-inch mattress lists a gray cloth cover and one standard pillow. Several of the foam replacement models specify that a cover is not included.
Can a foam mattress be cut to fit?
FoamRush says its 48-by-80-inch gel foam can be customized with suitable cutting tools. Before cutting any mattress, confirm the product’s guidance and measure carefully; trimming may affect the finished fit.