What Is Sleep Number
Sleep Number is the bed brand built around picking your own firmness. Air chambers inside the mattress inflate or deflate to change the feel, with foam and other comfort layers on top. Share a bed? Each side gets its own setting, so neither of you has to settle.
The lineup comes in three collections. ComfortMode is the one you adjust with a remote. ComfortNext adds automatic firmness adjustments and app controls, while the Climate collection adds active cooling, with warming on Climate360. Regular queen prices start at about $2,000 for ComfortMode. Sleep Number also sells adjustable bases that raise the head and feet, plus pillows in different shapes and heights.
Those features can serve a medical purpose when your sleep trouble is part of a health condition, like low back pain or nighttime reflux. A Letter of Medical Necessity documents that, so you can pay with pre-tax money. For mattresses in general, see our mattress eligibility guide; this page sticks to Sleep Number's own beds, bases and pillows.
Why Sleep Number Qualifies for HSA/FSA
Sleep Number qualifies when a licensed provider writes down how the mattress, base or pillow helps manage your health condition. The feature that matters depends on you: adjustable firmness for a sore back, a raised head for reflux, a supportive pillow for your neck. Your LMN names it.
IRS Publication 502 includes the “diagnosis, cure, mitigation, treatment, or prevention of disease” in its definition of medical expenses. Here are some of the common conditions a provider can document for a bed, base or pillow:
- Chronic low back pain: With adjustable firmness, you can firm up or soften the support under your back whenever you need to. A 2021 review of 39 studies in the Journal of Orthopaedics and Traumatology found that medium-firm mattresses promote comfort, sleep quality and spinal alignment.
- Insomnia: Your bed is part of your sleep setup, and it's one part you can actually change. MedlinePlus's tips for trouble falling or staying asleep include getting a comfortable mattress, since a lumpy, too soft or too hard one makes it hard to get comfortable enough for sleep.
- Nighttime GERD: Here it's the base that matters, since it raises your upper body. NIDDK includes elevating the head 6 to 8 inches among the changes a doctor may recommend to reduce reflux symptoms.
- Chronic neck pain: This is where the pillow comes in. MedlinePlus suggests a firm mattress with a pillow that supports the neck; Sleep Number's ComfortFit range offers Classic, Curved and Ultimate shapes.
Not on the list? A mattress, base or pillow still qualifies when your provider ties it to some other condition you're managing.
Which Sleep Number Products Qualify
Sleep Number's mattresses, adjustable bases and supportive pillows all qualify with an LMN covering the health condition they help you manage, from an entry ComfortMode to a full Climate360 setup. The price changes a lot across that range, but the letter route doesn't.
These are regular U.S. list prices checked on Sleep Number's own site on October 18, 2026. Mattresses and bases are priced in queen, and the pillow's starting price is for the Standard Classic shape.
| Sleep Number product | What it is | Regular price | HSA/FSA eligibility |
|---|---|---|---|
| ComfortMode / ComfortMode Lux | Mattresses with independently adjustable firmness | $1,999 / $2,499 | Yes, with an LMN |
| ComfortNext / ComfortNext Lux / ComfortNext Ultra | Smart mattresses with automatic firmness adjustments | $2,999 / $3,999 / $4,499 | Yes, with an LMN |
| ClimateCool with Foundation | Active-cooling mattress and fixed foundation | $5,749 | Yes, with an LMN |
| Climate360 with smart adjustable base | Active cooling and warming with adjustable positioning | $9,249 | Yes, with an LMN |
| Adjustable Base | Remote-controlled head and foot elevation | $1,599 | Yes, with an LMN |
| FlexFit 2 / FlexFit 3 | Smart adjustable bases; FlexFit 3 adds foot warming | $1,899 / $2,199 | Yes, with an LMN |
| ComfortFit pillow | Foam-and-down-alternative pillow in three shapes | From $99.99 | Yes, with an LMN |
On a bed this pricey, pre-tax money adds up fast: HSA/FSA funds trim up to 30% off the real cost. With taxes at a combined 30%, the $1,999 ComfortMode queen saves you $599.70 in taxes, so its effective cost is $1,399.30 before sales tax. Your actual savings depend on your tax rates and how you fund the account.
Looking at a temperature-control mattress cover too? Our Eight Sleep eligibility page covers that brand's products.
How to Get Sleep Number Covered With a Letter of Medical Necessity
You have two ways to get a Letter of Medical Necessity for your Sleep Number mattress, base or pillow:
- Through Crates, typically in under 24 hours. You'll spend 2 to 3 minutes on the online health assessment. A licensed provider reviews it, and if you qualify, your letter is issued for the Sleep Number product. You can use your LMN for 12 months, and it renews each year.
- Through your own doctor, a few days to a few weeks. Book a visit and say you want to use HSA/FSA funds for a Sleep Number mattress, base or pillow. Ask them to document how it helps prevent, manage, or reverse your condition. Check that the letter is signed and dated; you might owe a copay for the visit.
How to Buy Sleep Number With HSA/FSA Funds
Whether it's a mattress, base or pillow, buy online or in a store, then get your money back:
- Get your Letter of Medical Necessity first. Go through Crates or your own doctor, using either route above.
- Buy the product anywhere. Pay with your personal card and keep the itemized receipt showing the product and amount paid.
- Get your funds back. Let Crates file your claim through one-click reimbursement, or upload the letter and receipt yourself. If you use an HSA, save the letter and receipt with your tax records.
Our HSA vs. FSA guide explains how the two accounts work.
