Quick verdict
Yawnder Reviews · Original review material restored September 2026
Beautyrest Black K-Class Review: Archived Luxury Hybrid Construction Restored
The K-Class is a legacy Beautyrest Black model, but its original construction detail had been largely removed from the live page.
T3 pocketed coils
The K-Class used Beautyrest’s T3 Pocketed Coil system, built around triple-strand coils intended to add durability and targeted support while allowing each coil to move independently.
Plush comfort stack
Above the coil unit were multiple comfort foams, including memory-foam layers and cooling-focused materials. The result was a thick, plush luxury-hybrid feel rather than a flat firm surface.
Cooling package
BlackICE/RightTemp-era materials were used to manage surface temperature. Those technologies belonged to this model generation and should not automatically be mapped to current Beautyrest Black beds.
Who the old model suited
The plush K-Class made the most sense for sleepers prioritizing cushioning and pressure relief. People seeking a very firm, shallow feel were less likely to prefer it.
Archived status
Beautyrest has since revised the Black collection, so this page now serves as a historical construction reference.
Current-shopping note
The K-Class is a legacy model. Compare current Beautyrest Black Series models separately rather than assuming the same layers, cooling technology or firmness.
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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 | 6 | 1–10 scale (6.5 = medium-firm) |
| Construction | Hybrid | Foam / hybrid / latex / airbed |
| Profile height (Yawnder measured) | Not measured | inches — measured on our own sample |
| Motion transfer | 7.8 | score /10 — higher is less disturbance |
| Edge support | 8.8 | score /10 — sitting and sleeping edge |
| Temperature | 8.4 | score /10 — higher sleeps cooler |
| Pressure relief | 9 | score /10 — shoulder and hip |
| Spine alignment | 8.8 | score /10 — neutral posture |
| Ease of movement | Not measured | score /10 — repositioning speed |
| Expected durability | 8.6 | score /10 — projected 5-year hold |
| Off-gassing | 8.2 | score /10 — higher is less smell |
| Queen price | $3,499 | MSRP before seasonal discounts |
| Manufacturer sleep trial | 100 nights | when bought direct from the brand |
| Manufacturer warranty | 10-Year Limited | as published by the manufacturer; applies wherever you buy |
| Last test date | August 27, 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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Use Yawnder's standardized test data to compare this mattress with other models, or answer a few questions and narrow the field by sleep position, feel and priorities.
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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 46 a partial standardized record.