The Sleep Number p5 was built for sleepers who wanted adjustable support without moving into the brand’s most expensive models. It is no longer part of Sleep Number’s current retail lineup, but the company still supports it as a legacy smart mattress. That distinction matters: this review is most useful for existing owners and people evaluating a used p5, not shoppers comparing new-mattress trial offers. Its strongest feature is still easy to understand. Small firmness changes can improve lower-back support while the cushioned top protects the shoulders. The downside is equally clear: the bed takes patience to tune, and its feel changes with the selected setting.
Table of Contents
- The Legacy p5 at a Glance
- Is the Legacy p5 Still Worth Considering?
- How We Evaluated the p5
- Our Testing Experience
- Where the p5 Shines—and Where It Does Not
- Key Specs and Ownership Notes
- How the Legacy p5 Scored
- Who Should Still Consider a p5?
- What to Know Before Buying a Used p5
- How Current Alternatives Compare
- Getting Better Results From a p5
- FAQs
The Legacy p5 at a Glance
| Mattress | Overall Score | Pros | Cons | Best For |
|---|---|---|---|---|
| Sleep Number p5 Smart Bed | 4.2/5 | Adjustable support; good pressure relief; less heat retention than dense foam | Discontinued; takes time to tune; average sitting-edge stability | Existing owners; couples with different firmness preferences; careful secondhand buyers |
Is the Legacy p5 Still Worth Considering?
The p5 remains a capable adjustable bed for people who already own one. At the right setting, it held the hips more level, cushioned the shoulders, and made position changes easier than a slow-moving all-foam mattress. Its edge felt secure enough while lying down, though sitting near the perimeter exposed more compression.
Buying one used is a different decision. The p5 is discontinued, so condition matters more than its original feature list. A secondhand unit only makes sense after you confirm that both air chambers hold their settings, the pump and controls work, the hoses are intact, and every required part is included. Without those checks, a conventional new mattress with a current trial is the safer purchase.
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Who it suits
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Existing owners who want to improve support by fine-tuning each side
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Couples who prefer different firmness levels
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Back-and-side combination sleepers who need both lumbar support and shoulder cushioning
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Who should look elsewhere
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Shoppers who want a new mattress with current trial and warranty coverage
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People who prefer the deep, slow contour of memory foam
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Anyone who needs a very firm edge for sitting or getting out of bed
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How We Evaluated the p5
We used the p5 nightly over several weeks and followed our mattress testing process to judge support, pressure relief, temperature control, motion isolation, responsiveness, edge stability, and the usable firmness range. Rather than settle on one first-night impression, we held each adjustment for multiple nights and checked the feel while lying on the back and side, changing positions, getting in and out of bed, and sitting at the edge. We also watched for changes in the pump, air chambers, and surface feel during regular use. The resulting scores describe this legacy test sample; they are not performance claims for Sleep Number’s current lineup.
Our Testing Experience
Sleep Number p5 Smart Bed
Our Testing Experience
We began with the bed set too soft. By morning, the pelvis sat lower than the rib cage and the lower back felt less supported. A modest increase made the surface noticeably more level without turning the comfort layer hard. Holding each change for several nights worked better than chasing a perfect feel every evening.
On the side, the cushioned top gave the shoulder room to settle while the air support limited the deeper drop at the waist and hips. The p5 never produced the slow, enveloping feel of dense memory foam; it felt easier to move across and quicker to respond when we rolled onto the back. Partner movement remained controlled at our preferred settings, although a softer side allowed more visible surface movement.
Marcus, Jenna, and Ethan repeated position changes and edge checks. The center stayed balanced, and lying close to the side felt stable. Sitting on the edge revealed more compression, so people who push off the perimeter to stand may want firmer support. For sleepers who run warm, the surface also held less heat than many foam-heavy mattresses we have used, but it did not feel actively cooled.
What we liked
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Separate firmness control made it easier to support the hips and lower back without over-firming the shoulders.
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The comfort layer relieved pressure without creating a deep, restrictive sink.
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Position changes felt easy, and the surface retained less heat than dense memory foam.
Who it is best for
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Existing p5 owners who alternate between back and side sleeping.
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Couples who need a different firmness level on each side.
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Sleepers whose support needs change and who are willing to adjust the bed gradually.
Where it falls short
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Finding a supportive setting takes several nights and disciplined, small changes.
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The sitting edge compresses more than a reinforced hybrid perimeter.
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As a discontinued powered bed, a used p5 carries more condition and repair risk than a new fixed-feel mattress.
Where the p5 Shines—and Where It Does Not
| Pros | Cons |
|---|---|
| Separate firmness control for each side | No longer sold in the current lineup |
| Balanced pressure relief without a deep foam hug | Requires a patient tuning period |
| Less heat retention than many dense foam mattresses | Sitting edge is stable, not firm |
| Responsive Air can adjust support as a sleeper moves | Pump, hoses, controls, and air chambers add maintenance risk |
Key Specs and Ownership Notes
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Retail status: discontinued from Sleep Number’s current mattress lineup; still covered by the company’s legacy support resources
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Mattress height: 10 inches
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Support system: adjustable air chambers with separate-side control on compatible dual-chamber sizes
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Comfort: plush, pressure-relieving layers with a temperature-balancing design
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Smart function: Responsive Air can adjust firmness as a sleeper changes position
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Controls: Sleep Number app and/or a compatible optional smart remote, depending on the bed’s generation and setup
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Documented configurations: Twin, Twin XL, Full, Double, Queen, Eastern King, California King, Split King, Split California King, FlexTop King, and FlexTop California King; chamber setup varies by size
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Compatible support options documented for legacy units: mattress-only platform, Integrated Base or Foundation, Adjustable Base, and FlexFit 1, 2, or 3
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Coverage: original trial and warranty terms depend on the purchase date and order; existing owners should use their receipt and warranty documents rather than current mattress policies
How the Legacy p5 Scored
| Metric | Score | What We Found |
|---|---|---|
| Support | 4.5/5 | The right setting kept the pelvis level and the lower back supported. |
| Cooling | 4.1/5 | The surface retained less heat than many dense foam beds but did not feel actively cooled. |
| Pressure Relief | 4.2/5 | The top cushioned the shoulders and hips without excessive sink. |
| Motion Isolation | 4.2/5 | Partner movement stayed controlled, though softer settings allowed more surface motion. |
| Responsiveness | 4.3/5 | Rolling between the back and side felt easy. |
| Edge Support | 4.0/5 | Lying near the edge felt stable; sitting caused more compression. |
| Durability | 4.1/5 | The test sample stayed consistent over several weeks, but powered parts add long-term service considerations. |
| Overall | 4.2/5 | A strong legacy adjustable bed when it is complete, working, and carefully tuned. |
Who Should Still Consider a p5?
For an existing owner, the p5 is worth keeping if both sides hold air, the controls respond reliably, and the comfort layers remain even. Its separate firmness control is especially useful for couples and for sleepers who alternate between back and side positions. Before replacing the mattress, try one measured adjustment and give your body several nights to respond.
A used p5 deserves much more caution. Confirm the exact model and manufacture period, test both air chambers overnight, listen for a pump that runs unusually often, inspect hoses and connectors, and verify that the controls can operate both sides. Ask for the original receipt and component list, but do not assume the seller’s warranty transfers. If any powered part is missing or the price approaches that of a new conventional mattress, walk away.
If you simply want a comfortable new bed, choose based on the feature you value most: a cooling mattress for hot sleep, a traditional innerspring for easier movement, memory foam for deeper contouring, or a medium hybrid for a straightforward balance of cushion and support.
What to Know Before Buying a Used p5
This score reflects one legacy p5 sample over several weeks, not every version sold during the model’s lifespan. We did not run a years-long durability test, and the source material did not include instrument logs that would justify numerical pressure, temperature, vibration, or compression claims. Age, prior use, air leaks, pump wear, and missing controls can change how a secondhand bed performs. Sleep Number entered a court-supervised sale process in 2026 but stated that operations and warranty service continued; owners should still confirm coverage for their specific order before relying on service.
How Current Alternatives Compare
The p5’s advantage is separate-side firmness control. None of the conventional mattresses below duplicates that feature, but each is available new with current purchase policies and a simpler ownership path.
Brooklyn Bedding Aurora Luxe Cooling is the most relevant choice for hot sleepers. Its cooling cover, zoned hybrid support, and three firmness choices offer a more conventional feel with a stronger perimeter. Choose it when temperature control and edge stability matter more than changing firmness from night to night.
Saatva Classic has the liveliest, most traditional feel of the group. It comes in multiple firmness and height options, but the selected feel stays fixed after purchase. It is the better fit for shoppers who want easy movement, dependable edge support, and in-room setup without pumps or app controls.
TEMPUR-Cloud moves in the opposite direction. Its foam version contours more slowly and absorbs movement more thoroughly, while the hybrid adds bounce and edge support. It suits sleepers who want close pressure relief and minimal partner disturbance, not an adjustable air feel.
Helix Midnight is the simplest match for side sleepers who like a medium feel. It combines foam cushioning with coil support and offers optional cooling and lumbar-support upgrades. It gives up the p5’s per-side adjustability but is easier to choose, set up, and understand.
Getting Better Results From a p5
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Keep one setting for 3–5 nights before judging it.
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Change the setting by 5 or 10 at a time instead of making a large jump.
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If the pelvis drops while you are on your back, move slightly firmer.
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If the shoulder feels crowded on your side, soften the bed slightly before replacing your pillow.
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Tune each side separately, then lie down together to check motion.
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Use breathable sheets and avoid thick pads that trap heat.
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Check the hoses for kinks if a side feels softer than its saved setting.
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Investigate a pump that runs constantly; loose connections can mimic air loss.
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Confirm clearance, cord routing, and compatibility before pairing the mattress with a different adjustable base.
FAQs
Does the p5 feel plush or firm?
The comfort layer feels cushioned, while the air setting controls how firmly the mattress supports the body. Our preferred balance was around a medium to medium-firm feel, but that description changes with the selected setting and the sleeper’s body.
How long does it take to find the right setting?
Expect several nights. Hold one setting for 3–5 nights, then adjust by 5 or 10 if the hips still sink or the shoulders feel crowded.
Does the p5 work well for couples?
Yes, especially when partners prefer different firmness levels. Movement stayed well controlled at our preferred settings, although an extremely soft side can allow more surface motion.
What is the biggest mistake p5 owners make?
Changing the setting too far or too often. Small adjustments held for several nights make it easier to tell whether the pelvis is level and the pressure points are comfortable.
