# ThermoBalance LX (Medium) vs Leesa Reserve: Firmness, Price, and Construction Compared

Canonical: https://squishmat.com/compare/brooklyn-bedding-thermobalance-lx-medium-vs-leesa-reserve · Data refreshed 2026-10-06 · Source: SquishMat

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

## Full spec table

| Spec | ThermoBalance LX (Medium) | Leesa Reserve |
| --- | --- | --- |
| Type | Hybrid | Hybrid |
| Firmness | 6/10 | 6/10 |
| Height | 14" | 14" |
| Queen price | $2,532 | $2,589 |
| Price range (all sizes) | $1,832–$3,199 | $1,679–$2,589 |
| Foam densities (lb/ft³, top → bottom) | 1.5 / 5.6 / 2.5 / 1.8 / 1.6 | 4.0 / 5.0 / 2.5 / 1.8 / 1.8 |
| Coil gauge | 14.5 | 13.5 |
| Coil count (queen) | — | — |
| Cooling | 6/10 | 5/10 |
| Motion isolation | 6/10 | 7/10 |
| Edge support | 7/10 | 8/10 |
| Pressure relief | 8/10 | 9/10 |
| Support | 8/10 | 8/10 |
| Natural materials | 4/10 | 4/10 |
| Notable features | Talalay latex + memory foam hybrid, Aerated latex cooling layer, Zoned pocketed coil core, Medium responsive feel | Luxury triple memory foam comfort, 5 PCF premium memory foam, Zoned pocketed coil core, Deep-contour plush feel |
| Spec source | NapLab | NapLab |

## Key differences

- The Leesa Reserve runs thicker support coils (13.5-gauge vs 14.5-gauge — lower gauge means thicker, firmer wire).

## Who each mattress is for

**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.

**Leesa Reserve:** The Leesa Reserve 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.

## FAQ

### Which is firmer, the ThermoBalance LX (Medium) or the Leesa Reserve?

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 ThermoBalance LX (Medium) or the Leesa Reserve?

The ThermoBalance LX (Medium) is cheaper in a queen: $2,532 versus $2,589, as of 2026-10-06.

### What is the main construction difference between the ThermoBalance LX (Medium) and the Leesa Reserve?

Both are hybrid builds; the biggest spec difference is the support core — the Leesa Reserve uses thicker coils. Full specs are in the table above.

## More

- [ThermoBalance LX (Medium) — full specs](https://squishmat.com/mattresses/brooklyn-bedding-thermobalance-lx-medium)
- [Leesa Reserve — full specs](https://squishmat.com/mattresses/leesa-reserve)
- [Comparison matrix: every mattress we track](https://squishmat.com/compare)

Free to cite with attribution — link to the canonical page. Where a datapoint traces to a third-party teardown, please credit the original measurer too (sources are cited per bed on https://squishmat.com/mattress-database).