# Boring Mattress vs Polysleep Sierra: Firmness, Price, and Construction Compared

Canonical: https://squishmat.com/compare/boring-mattress-vs-polysleep-sierra · Data refreshed 2026-09-04 · Source: SquishMat

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

## Full spec table

| Spec | Boring Mattress | Polysleep Sierra |
| --- | --- | --- |
| Type | Foam | Foam |
| Firmness | 6/10 | 6/10 |
| Height | 10" | 9" |
| Queen price | $699 | $795 |
| Price range (all sizes) | $399–$899 | $695–$895 |
| Foam densities (lb/ft³, top → bottom) | 2.2 / 2.2 / 1.9 | 3.0 / 1.4 |
| Coil gauge | — | — |
| Coil count (queen) | — | — |
| Cooling | 5/10 | 5/10 |
| Motion isolation | 7/10 | 7/10 |
| Edge support | 5/10 | 5/10 |
| Pressure relief | 7/10 | 8/10 |
| Support | 6/10 | 6/10 |
| Natural materials | 2/10 | 2/10 |
| Notable features | Simple three-layer foam build, Medium-firm universal feel, Made in Arizona, Straightforward budget pricing | Entry-level all-foam bed, 3 PCF comfort foam, Simple two-layer build, Lowest Polysleep price |
| Spec source | NapLab | NapLab |

## Key differences

- On the published specs these two are close substitutes — similar firmness, price, and construction. Decide on current price, trial length, and returns policy.

## Who each mattress is for

**Boring Mattress:** The Boring Mattress has a medium feel that works for many side and back sleepers, and for combination sleepers who switch positions.

**Polysleep Sierra:** The Polysleep Sierra 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.

## FAQ

### Which is firmer, the Boring Mattress or the Polysleep Sierra?

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 Boring Mattress or the Polysleep Sierra?

The Boring Mattress is cheaper in a queen: $699 versus $795, as of 2026-09-04.

### What is the main construction difference between the Boring Mattress and the Polysleep Sierra?

Both are foam builds with similar published specs — the differences come down to feel and price rather than construction. The full layer-by-layer comparison is in the table above.

## More

- [Boring Mattress — full specs](https://squishmat.com/mattresses/boring-mattress)
- [Polysleep Sierra — full specs](https://squishmat.com/mattresses/polysleep-sierra)
- [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).