The Sleep Number p5 Smart Bed Mattress is a Performance Series smart bed built around adjustable support and a cooler, pressure-relieving top. In our testing, its biggest strength was how quickly we could improve lumbar support without giving up shoulder comfort. The trade-off was the setup period: it took a few nights of small adjustments to find the best setting. Once tuned, the feel landed closest to medium or medium-firm for our team.
Table of Contents
Product Overview
| Mattress | Overall Score | Pros | Cons | Ideal For |
|---|---|---|---|---|
| Sleep Number p5 Smart Bed Mattress | 4.2/5 | Adjustable support; strong pressure relief; cooler surface than many foam-heavy beds | Needs a tuning period; edge support is good, not extra-firm | Combo sleepers; couples with different firmness preferences; sleepers who want more lower-back support |
Final Verdict
Once we found the right settings, the p5 felt more precise than a fixed-feel mattress. In our testing, it kept the hips from sinking too far, eased pressure at the shoulders, and slept cooler than many dense all-foam beds. The edge was stable enough for daily use, but it never felt especially rigid.
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Who It’s For
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Sleepers who want adjustable firmness, including different feels on each side
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Back-and-side combo sleepers who need easier alignment tuning
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Who It Isn’t For
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Shoppers who want a fixed feel from the first night
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People who want a deep, classic memory-foam hug
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Anyone who needs a very firm sitting edge
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How We Tested It
We slept on the p5 nightly and repeated our hands-on mattress testing checks for support, cooling, pressure relief, motion isolation, responsiveness, edge support, firmness range, and overall surface stability. Over several weeks, we also tracked whether the feel stayed consistent, whether movement across the bed stayed controlled, and whether the materials seemed steady under regular use. We changed settings across multiple nights so our conclusions reflected actual testing rather than a single first impression.
Our Testing Experience
Sleep Number p5 Smart Bed Mattress
Our Testing Experience
Our first night on the p5 was a reminder that settings matter. We started too soft and noticed that familiar hip-dip feeling by morning. After a small bump in firmness, the bed felt much more level through the pelvis and lower back. Over the rest of the week, the top layers eased pressure at the shoulders without letting us sink in too deeply. Marcus, Jenna, and Ethan also ran in-and-out-of-bed and position-change checks; the surface stayed fairly calm, though motion control changed somewhat with the chosen setting. Marcus, who tends to sleep warm, also noted that the p5 held less heat than many foam-heavy beds we’ve tested.
What we liked
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Adjustable support made it easier to level the hips and lower back
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Pressure relief was noticeable without a deep sink-in feel
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The surface slept cooler than many warmer foam designs
Who it is best for
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Back and side sleepers who want adjustable support
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Couples who need different firmness on each side
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Sleepers who notice alignment issues after long desk days
Where it falls short
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Finding the best setting takes trial and error
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Edge support is dependable, but not the firmest in the category
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The tech-forward setup will not appeal to everyone
Pros & Cons
| Pros | Cons |
|---|---|
| Adjustable feel with firmer or softer settings on each side | Needs a short tuning period |
| Pressure relief from the comfort layers | Edge support is solid, not especially firm |
| Cooler surface feel than many foam-heavy beds | Does not give a deep all-foam “hug” |
| Auto-adjust feature helps the bed stay balanced as you move | The final feel depends heavily on your chosen setting |
Details
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Mattress height: 10 inches
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Comfort system: 4 inches of pressure-relieving comfort layers
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Cooling design: marketed to draw away 2x more heat; in our testing, it slept cooler than many foam-heavy beds
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Adjustability: each side can be set firmer or softer, and the bed can automatically adjust as you move
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Trial: 100-night trial; returns or one-time exchanges begin after night 30 and include a fee
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Warranty: 15-year limited warranty, with full coverage in year one and prorated coverage after that
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Size options: Twin, Twin XL, Full (single chamber), Double (dual chamber), Queen Dual (dual chamber), Eastern King, California King, Split Eastern King, Split California King, FlexTop Eastern King, FlexTop California King
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Optional bases: Integrated Base, Integrated Base & Frame, Adjustable Base, FlexFit 2, FlexFit 3
Review Score
| Metric | Score | Remarks |
|---|---|---|
| Support | 4.5/5 | Once tuned, the bed kept the hips level and the lower back better aligned. |
| Cooling | 4.1/5 | We noticed less heat buildup than on many dense foam beds. |
| Pressure Relief | 4.2/5 | Shoulders and hips got cushioning without a deep sink. |
| Motion Isolation | 4.2/5 | Partner movement stayed fairly controlled, though settings changed the feel. |
| Responsiveness | 4.3/5 | Changing positions felt easy and not sticky. |
| Edge Support | 4.0/5 | Stable enough for everyday use, but not especially rigid. |
| Durability | 4.1/5 | The materials felt steady over weeks of testing, though long-term wear takes more time to judge. |
| Overall | 4.2/5 | A strong all-around performer if you are willing to fine-tune it. |
Choosing Guide
Choose the p5 if adjustable firmness is the main reason you’re shopping. It makes the most sense for sleepers who switch between back and side positions, or for couples who want different feels on each side. If you prefer a simpler mattress with a fixed feel, a standard hybrid may be easier to live with.
For common scenarios:
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If you sleep hot but want a more conventional, non-adjustable feel, Brooklyn Bedding Aurora Luxe or Saatva Classic may make more sense.
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If you mainly want deeper contouring and less adjustability, Tempur-Pedic TEMPUR-Cloud or Helix Midnight may be a better match.
Limitations
The biggest trade-off is the learning curve. If you do not experiment with settings, it is easy to miss what the bed does best. Edge support is solid rather than standout, and sleepers who dislike app-based or tech-driven features may find the experience more involved than they want.
Alternatives
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Why choose this model
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You want adjustable firmness and per-side customization
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You want better alignment without losing shoulder relief
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You want a cooler, more balanced feel than many warm foam beds
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Alternatives to consider
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Saatva Classic for a more traditional, fixed-feel innerspring-hybrid option
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Tempur-Pedic TEMPUR-Cloud for deeper foam contouring
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Helix Midnight for a simpler mainstream hybrid feel
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Pro Tips
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Give one setting 3–5 nights before making a big change.
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Adjust in small steps until your hips feel level on your back.
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If your shoulder feels crowded on your side, soften slightly before changing pillows.
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Use breathable sheets and bedding to support cooling.
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For couples, tune each side separately, then check motion together.
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If the edge feels softer than you want while sitting, raise the setting slightly.
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Re-check settings after travel, hard workouts, or long workweeks.
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Keep the controls nearby so you can make one change and go back to sleep.
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If you add a base, confirm room clearance and wiring before setup.
FAQs
Does the p5 feel plush or firm?
It can move on either side of neutral depending on the setting, but in our testing the best balance felt closest to medium or medium-firm.
How long did it take to find the right setting?
A few nights of small adjustments. Once we stopped making big jumps, it became much easier to lock in better support.
Is it good for couples who wake each other up?
It handled movement better than we expected, especially once both sides were dialed in. The motion feel can still change depending on how soft or firm each side is.
What’s the biggest mistake buyers make?
Going too soft too quickly. In our testing, that was the fastest way to lose hip support and wake up feeling out of line.
