When you're sorting through sleep comfort options for a king bed, the decision usually comes down to repairing what you already have or starting over with a full mattress. That's exactly the choice here: a $124.99 Select Comfort Sleep Number 1/2 Air Bed Chamber for King Mattress S-815 E-King versus a $736.99 Gel-Infused Bliss Cooling King Memory Foam Mattress. Both are for a king bed, but they solve different problems. The chamber is an internal replacement part for a Sleep Number E-King air bed. The foam mattress is a complete memory foam bed in a box. The right pick depends on whether you need to fix an air chamber or upgrade the whole sleep surface.
Quick Verdict
The Select Comfort Sleep Number chamber is the lower-priced way to keep an existing Sleep Number S-815 E-King bed adjustable without buying a whole new mattress. The Gel-Infused Bliss Cooling mattress is the higher-priced route to a complete king sleep surface, with cooling-focused construction and a new-condition foam bed. Choose the chamber when your air bed needs a replacement bladder; choose the foam mattress when you want one full mattress to replace everything.
At a Glance
| Option | Listed Price | Condition | Key Details | Price Bar |
|---|---|---|---|---|
| Select Comfort Sleep Number 1/2 Air Bed Chamber (S-815 E-King) | USD 124.99 | Used | Adjustable firmness, inflatable single chamber, air bladder; described as tested to hold air with no leaks | |
| Gel-Infused Bliss Cooling King Memory Foam Mattress | USD 736.99 | New | 14-inch profile, cool-touch nylon cover, NanoGEL memory foam, CertiPUR-US certified foam |
Where Each Product Wins
- Select Comfort Sleep Number chamber: Wins as a targeted replacement part. It is described as tested and able to hold air for multiple days with no leaks, and it comes with two air ports and two white caps. For the Sleep Number S-815 E-King setup, this is the focused way to restore an adjustable air bed.
- Gel-Infused Bliss Cooling mattress: Wins as a complete sleep surface. It is new, grey, and built for hot sleepers with its cooling-focused construction. This is the option to pick when you need a whole mattress, not just one component.
Product Notes
Select Comfort Sleep Number 1/2 Air Bed Chamber for King Mattress S-815 E-King
This is a replacement air chamber for a Sleep Number S-815 E-King king mattress, not a full mattress. For its listed price, its entire job is to restore an air bed that already has the rest of the system in place. It is described as tested and able to hold air for multiple days with no leaks, which is the most important check for an air bladder. It has two air ports, includes two white caps, and its features include adjustable firmness, an inflatable single chamber, and an air bladder design. The limitation is condition: it is a used item in beige with expected minor discoloration, marks, and scuffs. If you're comfortable with visible wear on an internal part, the leak-test detail and lower listed price make it a sensible repair candidate.
14 Inch King Size Mattress, Gel-Infused Bliss Cooling King Memory Foam Mattress
This higher-priced option is the complete-mattress route. Instead of one internal component, you get a full memory foam mattress in a box. Its main selling point is temperature management: a cool-touch nylon cover blended with 30% plant-infused fiber, plus NanoGEL memory foam designed to improve airflow and reduce heat buildup. It is also positioned around pressure relief, spinal support, and CertiPUR-US certified foam. The color is grey and the condition is new. The limitation is cost: this is the higher-priced of the two, so it makes sense when you need a whole new sleep surface rather than a replacement part. If you already have a full mattress in place and only the air chamber needs attention, this is more than the situation calls for.
Final Choice by Use Case
- Repairing a Sleep Number S-815 E-King air bed: Choose the Select Comfort Sleep Number 1/2 Air Bed Chamber. The used condition and scuffs are the trade-off, but the leak-tested air bladder and lower listed price fit a targeted repair.
- Starting fresh with a full king mattress: Choose the Gel-Infused Bliss Cooling Memory Foam Mattress. The new condition and cooling-focused layers give you a complete sleep surface without part-by-part replacement.
