Quick verdict
Yawnder Reviews · Original review material restored September 2026
Sleep Number c2 Review: Original Delivery, Assembly & Air-Chamber Testing Restored
The c2 review had lost most of the hands-on setup that explained how a Sleep Number actually differs from a conventional mattress.
Dual air chambers
The c2 uses adjustable air chambers as the primary support system. On larger sizes, each side can be adjusted independently so partners can choose different firmness settings.
Delivery and setup
Yawnder documented the full delivery process. The mattress arrived in separate components and the delivery team assembled the base, cover, comfort layer, air chambers and tubing rather than simply unrolling a finished mattress.
Integrated base and hoses
The optional integrated base provided a flat support surface and kept the air hoses concealed. That mechanical infrastructure is a key part of the ownership experience and was missing from the shortened page.
Comfort layer and edge feel
The c2 has a relatively simple comfort system above the air chambers. Foam around the perimeter helps disguise the chamber edges, but the mattress feels fundamentally different from a thick foam or hybrid bed because firmness is controlled by air pressure.
App and controls
The reviewed setup could be adjusted through Sleep Number controls/app. That adjustability is the main reason to consider the c2 rather than expecting a luxury pillow-top feel.
Current-shopping note
Sleep Number has updated hardware, apps, delivery pricing and policies over time. Verify today’s c2 configuration and features before purchase.
See current Sleep Number options →
Affiliate link: Yawnder may earn a commission at no additional cost to you. Confirm the current model and availability with Sleep Number.
Yawnder Reviews · Disclosure:Some links may be affiliate links. Current specifications and policies can change.
Standardized test data
Every mattress in the current program follows the same rubric and order, combining instrument-measured categories with hands-on evaluations so scores are comparable across brands.
| Measurement | Result | How to read it |
|---|---|---|
| Firmness | 1 | 1–10 scale (6.5 = medium-firm) |
| Construction | Airbed | Foam / hybrid / latex / airbed |
| Profile height (Yawnder measured) | Not measured | inches — measured on our own sample |
| Motion transfer | 8.7 | score /10 — higher is less disturbance |
| Edge support | 8.3 | score /10 — sitting and sleeping edge |
| Temperature | 9.2 | score /10 — higher sleeps cooler |
| Pressure relief | 7.8 | score /10 — shoulder and hip |
| Spine alignment | 8 | score /10 — neutral posture |
| Ease of movement | 8.7 | score /10 — repositioning speed |
| Expected durability | 8 | score /10 — projected 5-year hold |
| Off-gassing | 7.1 | score /10 — higher is less smell |
| Queen price | $1,200 | MSRP before seasonal discounts |
| Manufacturer warranty | 10-Year Limited | as published by the manufacturer; applies wherever you buy |
| Last test date | August 26, 2026 | date of our most recent standardized test session |
How this score is built
Support and spine alignment 25% · pressure relief 20% · temperature 15% · motion transfer 15% · edge support 10% · durability 10% · value 5%. Scores come from standardized instrument measurements and structured hands-on evaluations using the same Yawnder testing rubric. Read the full rubric.
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Compare this mattress against 142 tested mattresses
Sort all 142 mattresses we have tested by pressure relief, support, cooling, motion isolation, edge support, price, trial and warranty, then filter by how you actually sleep. Of those, 86 hold a complete standardized record and 41 a partial standardized record.