Quick verdict
Yawnder Reviews · Original review material restored September 2026
Original delivery, assembly and air-chamber testing
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.
The video shows the earlier c2 and setup reviewed by Yawnder; current hardware and terms may differ.
Current-shopping note
Sleep Number has updated hardware, apps, delivery pricing and policies over time. The photos and observations above describe the earlier setup Yawnder reviewed; confirm the exact model and generation when shopping today.
What makes an adjustable-air mattress different?
The air chambers change firmness through the control system. On dual-chamber sizes, each side can be adjusted independently. This is different from choosing a fixed-firmness foam or hybrid mattress, but air adjustment does not replace a thick comfort layer or guarantee that both partners will prefer the same surface. Confirm chamber configuration for the size you select.
Trial, exchange and base costs
Sleep Number’s buying guide describes a 100-night mattress trial starting on delivery, with a 30-night period before a return or exchange request. Its returns policy says exchanges are final sale and do not start a new trial. Adjustable bases, including FlexFit bases, are listed as final-sale items. Verify applicable fees, delivery and eligibility in your order documents.
Setup and maintenance
Budget separately for any base and delivery service, and confirm what happens to your old mattress. Retain the owner’s guide and chamber caps if supplied; Sleep Number provides different setup and moving guides by generation. The hoses, pump and power requirements are part of ownership and should be considered when moving or replacing parts.
Frequently asked questions
Does adjusting firmness raise the head or foot? Not by itself. Position adjustment requires a compatible adjustable base.
Is the adjustable base included in the mattress trial? Sleep Number lists adjustable bases as final sale; check the current terms for the exact order.
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.
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