# Beautyrest Black (Medium) vs ThermoBalance LX (Medium): Firmness, Price, and Construction Compared

Canonical: https://squishmat.com/compare/beautyrest-black-medium-vs-brooklyn-bedding-thermobalance-lx-medium · Data refreshed 2026-10-02 · Source: SquishMat

These two are close substitutes on paper — the spec table below shows where they differ.

## 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 each mattress is for

**Beautyrest Black (Medium):** The Beautyrest Black (Medium) has a medium feel that works for many side and back sleepers, and for combination sleepers who switch positions. Strengths: Excellent pressure relief at the shoulders and hips; Strong, even support that keeps the spine aligned; Sturdy edges that make the full surface usable.

**ThermoBalance LX (Medium):** The ThermoBalance LX (Medium) has a medium feel that works for many side and back sleepers, and for combination sleepers who switch positions. Strengths: Excellent pressure relief at the shoulders and hips; Strong, even support that keeps the spine aligned.

## FAQ

### 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.

## More

- [Beautyrest Black (Medium) — full specs](https://squishmat.com/mattresses/beautyrest-black-medium)
- [ThermoBalance LX (Medium) — full specs](https://squishmat.com/mattresses/brooklyn-bedding-thermobalance-lx-medium)
- [Comparison matrix: every mattress we track](https://squishmat.com/compare)

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