Beautyrest Black (Medium) vs ThermoBalance LX (Medium)
These two are close substitutes on paper — the spec table below shows where they differ. Every number below comes from published teardowns and spec sheets (see our methodology); prices are queen-size, refreshed 2026-10-02.
Beautyrest Black (Medium) vs ThermoBalance LX (Medium): full spec table
| Spec | Beautyrest Black (Medium) | ThermoBalance LX (Medium) |
|---|---|---|
| Type | Hybrid | Hybrid |
| Firmness | 6/10 | 6/10 |
| Height | 15" | 14" |
| Queen price | $2,499 | $2,532 |
| Price range (all sizes) | $2,029–$2,799 | $1,832–$3,199 |
| Foam densities (lb/ft³, top → bottom) | 3.6 / 1.6 / 4.4 / 2.9 / 1.1 | 1.5 / 5.6 / 2.5 / 1.8 / 1.6 |
| Coil gauge | 19 | 14.5 |
| Coil count (queen) | — | — |
| Cooling | 6/10 | 6/10 |
| Motion isolation | 6/10 | 6/10 |
| Edge support | 8/10 | 7/10 |
| Pressure relief | 9/10 | 8/10 |
| Support | 9/10 | 8/10 |
| Natural materials | 4/10 | 4/10 |
| Notable features | T3 pocketed coil technology, RightTemp heat-wicking cover, Premium memory foam comfort, Reinforced edge support | Talalay latex + memory foam hybrid, Aerated latex cooling layer, Zoned pocketed coil core, Medium responsive feel |
| Spec source | NapLab | NapLab |
Key differences
- The ThermoBalance LX (Medium) runs thicker support coils (14.5-gauge vs 19-gauge — lower gauge means thicker, firmer wire).
Who the Beautyrest Black (Medium) is for
The Beautyrest Black (Medium) has a medium feel that works for many side and back sleepers, and for combination sleepers who switch positions.
- Excellent pressure relief at the shoulders and hips
- Strong, even support that keeps the spine aligned
- Sturdy edges that make the full surface usable
Who the ThermoBalance LX (Medium) is for
The ThermoBalance LX (Medium) has a medium feel that works for many side and back sleepers, and for combination sleepers who switch positions.
- Excellent pressure relief at the shoulders and hips
- Strong, even support that keeps the spine aligned
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Frequently asked questions
Which is firmer, the Beautyrest Black (Medium) or the ThermoBalance LX (Medium)?
They rate the same: both are a 6/10 on the firmness scale, a medium feel that works for many side and back sleepers, and for combination sleepers who switch positions.
Which is cheaper, the Beautyrest Black (Medium) or the ThermoBalance LX (Medium)?
The Beautyrest Black (Medium) is cheaper in a queen: $2,499 versus $2,532, as of 2026-10-02.
What is the main construction difference between the Beautyrest Black (Medium) and the ThermoBalance LX (Medium)?
Both are hybrid builds; the biggest spec difference is the support core — the ThermoBalance LX (Medium) uses thicker coils. Full specs are in the table above.
See how both stack up against every bed we track in the full comparison matrix, or dig into the complete specs for the Beautyrest Black (Medium) and the ThermoBalance LX (Medium).