This replacement comfort foam layer is the softest foam we offer for a Sleep Number® bed — the layer that sits on top of the air chambers and gives the surface its feel. Soft and plush, it lets your body sink in a little more for a cushioned, pressure-relieving feel. Replacing a worn comfort layer eliminates body impressions and sagging and brings back the comfortable feel your bed once had, without touching the air chambers, pump, or cover you already own. Made in the USA and CertiPUR-US® tested.
Soft, plush feel
1.5 lb density
12 ILD firmness
1"–4" thickness
CertiPUR-US® tested
Made to order, USA
Have a King Split-Head FlexTop bed? FlexTop is a specialty size — a solid foam layer with a 34" cut at the head so each side raises independently. Shop the correct size in our
FlexTop Split-Head collection →
What this foam feels like
This is the softest, plushest option in our foam line. At 1.5 lb density and 12 ILD it cushions your body and relieves pressure, letting you sink in more than our medium or firm foams. It is the choice if you find your bed too firm or you want a softer, more contouring surface. Prefer a more balanced feel? Our medium regular foam (35 ILD) is the closest match to Sleep Number original foam, and our firm regular foam (50 ILD) is the most supportive.
Which thickness should I choose?
The thickness you pick sets how much foam sits over the air chambers, and it also affects your shell height. Most beds use a 2" or 3" comfort layer.
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Match what you have to keep the same shell height — measure your current foam and order the same thickness.
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Go thicker (for example 2" up to 3") for a deeper, more cushioned layer, but remember it raises your shell height by the difference, so order a cover to match if you are replacing that too.
Not sure how thickness ties into shell height? Our guide to measuring your Sleep Number bed walks through it, or call us at 610-327-2322.
Specifications
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Feel: soft and plush — the softest of our foam options
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Density: 1.5 lb
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Firmness: 12 ILD
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Thickness options: 1", 2", 3", or 4"
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Quality: CertiPUR-US® tested
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Made to order in the USA to fit your size and thickness
Compare our Sleep Number foams
All of our comfort foams are made to order in the sizes and heights shown on each product. Here is how the feels compare so you can pick the right one:
| Foam |
Feel |
Firmness |
Best for |
|
Soft Regular (this page) |
Plush, sink-in |
12 ILD |
Softening a bed that feels too firm |
| Medium Regular |
Balanced, original feel |
35 ILD |
Most people; firming up a sagging bed (closest to original) |
| Firm Regular |
Extra-firm, little give |
50 ILD |
Sleepers who want a very hard surface |
| Gel Memory |
Contouring, cooler, sink-in |
Medium (cradle) |
Pressure relief; plush premium feel |
| Latex |
Buoyant, responsive, on-top |
29 ILD (medium) |
Lively support; durable upgrade (not a Sleep Number foam) |
| Egg Crate |
Light cushion + airflow |
35 ILD |
Economical comfort and cooling boost |
Sizes & measurements
Choose your size below and the thickness (1"–4") that matches your bed. The foam lays over the air chambers inside the cover.
| Size |
Foam (W × L) |
| Twin |
38" × 75" |
| Twin XL |
38" × 80" |
| Full |
54" × 75" |
| Split Queen |
30" × 80" (per side) |
| Queen |
60" × 80" |
| Expanded Queen |
66" × 80" |
| King |
76" × 80" |
| California King |
72" × 84" |
| Split Cal King |
36" × 84" (per side) |
Will this fit my Sleep Number bed?
Because every layer is made to order, we fit older beds, newer smart-bed models, split and FlexTop setups, and sizes the manufacturer no longer sells — including Split Queen, Expanded Queen, and Split Cal King. If the foam sides of your bed have also softened, many owners refresh the perimeter at the same time with new foam side rails or the full complete rail set. Building a newer smart-bed model? You can build your own comfort layer instead. Browse everything on our Sleep Number foam & rails page or the full Sleep Number repair parts collection.
Frequently asked questions
What does this foam do?
It is the comfort layer that lays on top of the air chambers and gives the bed its surface feel. Replacing a worn comfort layer removes body impressions and sagging and restores a soft, cushioned surface.
How soft is this foam?
It is the softest option we offer — a plush feel at 1.5 lb density and 12 ILD that lets your body sink in and relieves pressure. It is softer than both our medium and firm foams.
Should I choose soft, medium, or firm?
Choose this soft foam if your bed feels too firm or you want a plush, contouring surface. The medium regular foam (35 ILD) is the closest match to Sleep Number original foam, and the firm regular foam (50 ILD) is the most supportive.
What thickness should I order?
Match the thickness of your current comfort foam to keep the same shell height; most beds use 2" or 3". Going thicker adds more cushioning but raises your shell height by the difference, which matters if you are also replacing the cover.
Is this foam safe and durable?
Yes. It is made in the USA, CertiPUR-US® tested, and built to hold up to daily use.
Will it fit an older or discontinued size?
Yes. Because it is made to order, we can match older, split, and discontinued sizes, including Split Queen, Expanded Queen, and Split Cal King.
What if the foam is too firm or too soft?
No problem — we offer a 30-day comfort exchange. Return it for a full refund or credit, or keep it and take a one-time 50% off a replacement (most people choose this — nothing to ship back). See our Foam Comfort Exchange & Return Policy for full details.
