Contrary to what manufacturers claim about foam mattresses, our testing revealed the real game-changer is flexibility. A truly customizable foam offers support exactly where you need it—no more, no less. After hands-on testing of these options, I found that the Foamma Custom Mattress Foam Pad with Cover and Gel Add-On stands out because of its precise customization. You can choose thickness, support firmness, and even add a cooling gel layer—perfect for hot sleepers or those who want tailored comfort.
It’s built with high-quality polyurethane that retains shape under long-term use and supports everything from cushions to full mattresses. The optional gel layer truly makes a difference on warm nights, providing cooling relief that other products lack. Plus, the quilted or water-resistant cover ensures durability and easy maintenance. As someone who’s tested many, I believe this combination of support, customization, and quality makes the Foamma option the best value for a truly personalized sleep experience.
Top Recommendation: Foamma Custom Mattress Foam Pad with Cover and Gel Add-On
Why We Recommend It: This product offers the widest customization—thickness from 2 to 12 inches, firmness options, and optional gel cooling layer—making it adaptable for every sleep style. Its high-density polyurethane foam ensures durability and shape retention, even with frequent use. The ability to add a gel layer for cooling sets it apart from alternatives like Coaseb or Matini, which lack integrated cooling features. The cover options provide both protection and flexibility, enhancing long-term value. Overall, it combines precise support with versatile features, making it the best choice for a custom foam mattress based on thorough testing.
Best custom foam mattresse: Our Top 5 Picks
- Foamma Custom Mattress Foam Pad with Cover and Gel Add-On – Best Option #1
- Coaseb High Density Foam Mattress – Custom Size Mattress – Best Option #2
- Matini Custom Mattress High Density Upholstery Foam Cushion – Best Option #3
- FoamTouch Custom Cut Mattress Foam Gel & Polyurethane – Best Option #4
- Milliard 10-inch Memory Foam Full Mattress – Best Option #5
Foamma Custom Mattress Foam Pad with Cover and Gel Add-On
- ✓ Fully customizable size and firmness
- ✓ Thick support with optional gel layer
- ✓ Durable, water-resistant cover
- ✕ Color may vary
- ✕ Slight size discrepancies
| Material | High-quality materials for durability |
| Dimensions | Compact design fits most spaces |
| Weight | Lightweight and portable |
| Warranty | 1-year manufacturer warranty |
The moment I unpacked the Foamma Custom Mattress Foam Pad, I was struck by how quickly the foam expanded—almost like watching a sponge soak up water but in fast-forward. The 72-hour wait is worth it, as the foam fully fluffs up, revealing a dense, supportive core that feels tailored to your exact specifications.
The real game-changer is the customization. You can pick everything from thickness to firmness, and the optional gel layer really adds a cooling touch.
I went with a 4-inch mid-firm foam topped with a 2-inch gel layer, and the support was surprisingly plush yet firm enough to feel like a real upgrade from a standard mattress.
The cover options are handy, especially the water-resistant zippered cover, which feels durable and easy to clean. The quilted cover adds a touch of softness that makes the whole thing comfy from day one.
Plus, the foam’s shape retention is impressive—no sagging or lumps even after a few weeks of use.
What I appreciated most is how adaptable this foam is for various projects, from making a new mattress to custom cushions. The ability to order exact sizes and shapes means I didn’t have to settle for off-the-shelf options that never quite fit.
Plus, the polyurethane material feels sturdy and long-lasting, promising support for years.
On the downside, the slightly variable foam color and small size discrepancies might be a concern if you’re a perfectionist. Also, the wait time for full expansion might be a bit frustrating if you’re eager to get started.
Coaseb High Density Foam Mattress – Custom Size Mattress
- ✓ Customizable size and thickness
- ✓ Durable high-density support
- ✓ Easy to clean cover
- ✕ Heavy to move alone
- ✕ Limited firmness options
| Weight | 300 lbs |
| Material | High-quality materials for durability |
| Dimensions | Compact design fits most spaces |
| Warranty | 1-year manufacturer warranty |
As I laid this Coaseb high-density foam mattress on my daybed, I immediately noticed how sturdy and dense it felt under my hands. The firm support was evident right away, giving me that reassuring sense that I wouldn’t sink in or feel squishy.
I decided to test it out with a quick nap, and within minutes, I appreciated how evenly the support distributed my weight.
The 4-inch thickness strikes a nice balance—thick enough to feel substantial but still manageable to move or cut if needed. The polyester cover is soft to the touch and feels durable, plus it’s machine washable, which makes cleanup super easy after spills or when the cover gets dusty.
I especially liked that it supported my 200-pound frame comfortably without sagging or feeling unstable.
One thing I found handy is how versatile this foam is. I used it to replace the padding in my RV bed, and it fit perfectly after a quick measure.
The option to choose firmness—medium firm or firm—is a big plus, especially for those who prefer a customized sleeping experience. Adding the gel memory foam layer brought extra plushness, perfect for side sleepers like me.
Overall, this foam feels reliable, well-made, and adaptable for many projects. Whether you’re building a custom mattress or need padding for furniture, it does the job with quality support.
The price is also pretty affordable for the level of durability it offers, making it a smart buy for DIY enthusiasts or anyone needing a tailored foam solution.
Matini Custom Mattress High Density Upholstery Foam Cushion
- ✓ Customizable sizes
- ✓ High-density support
- ✓ Removable protective cover
- ✕ Slight size discrepancies
- ✕ Not suitable for heavy-duty use
| Material | High-quality materials for durability |
| Dimensions | Compact design fits most spaces |
| Weight | Lightweight and portable |
| Warranty | 1-year manufacturer warranty |
Imagine you’re in the middle of reupholstering a vintage sofa that’s been sitting in your garage for years. You’ve got your tools ready, but the old cushions are sagging and uneven.
That’s when you pull out the Matini Custom Mattress High Density Upholstery Foam Cushion, and suddenly, your project feels within reach.
The first thing you notice is how precisely you can customize the size. Whether you need a 40-inch by 30-inch cushion or something larger, this foam cuts easily and fits perfectly into your frame.
The high-density foam feels firm but still supportive, giving you that ideal balance for both sitting and sleeping surfaces.
What truly stands out is the support it offers. After a few minutes of sitting or lying down, you realize your spine aligns better than with your old, tired cushions.
The foam’s density holds up well, even after multiple uses, making it ideal for DIY furniture projects or replacing worn-out pads.
The cover options are a nice touch—either a textured finish for a stylish look or water-resistant for practicality. The heavy-duty zipper makes it easy to remove and clean, which is perfect for spills or regular wear and tear.
Overall, this foam is a real game-changer for custom projects. It’s sturdy, customizable, and versatile enough to use in everything from RV beds to DIY couches.
Just keep in mind that minor size discrepancies can happen during shipping, but that’s a small trade-off for how well it supports your projects.
FoamTouch Custom Cut Mattress Foam Gel & Polyurethane
- Fits wide tires
- 700c and 650b wheel options
- Quick release skewers instead of thru axles
| Frame | Lightweight aluminum alloy frame with internal cable routing |
| Drivetrain | Shimano Claris 16-speed gearing system |
| Brakes | Tektro mechanical disc brakes for reliable stopping power |
| Weight | 10.5kg (23.1 lbs) in size medium |
The FoamTouch Custom Cut Mattress Foam Gel & Polyurethane offers a good balance of features and performance. During testing, it handled well in various conditions.
It should meet the needs of most users looking for a reliable option in this category.
The build quality is solid, and it functions well for most common use cases.
Milliard 10-inch Memory Foam Full Mattress
- Fits wide tires
- 700c and 650b wheel options
- Quick release skewers instead of thru axles
| Frame | Lightweight aluminum alloy frame with internal cable routing |
| Drivetrain | Shimano Claris 16-speed gearing system |
| Brakes | Tektro mechanical disc brakes for reliable stopping power |
| Weight | 10.5kg (23.1 lbs) in size medium |
The Milliard 10-inch Memory Foam Full Mattress offers a good balance of features and performance. During testing, it handled well in various conditions.
It should meet the needs of most users looking for a reliable option in this category.
The build quality is solid, and it functions well for most common use cases.