Boring Mattress vs Polysleep Sierra
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 2026-09-04.
Boring Mattress vs Polysleep Sierra: 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 the Boring Mattress is for
The Boring Mattress has a medium feel that works for many side and back sleepers, and for combination sleepers who switch positions.
Who the Polysleep Sierra is for
The Polysleep Sierra 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
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Frequently asked questions
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.
See how both stack up against every bed we track in the full comparison matrix, or dig into the complete specs for the Boring Mattress and the Polysleep Sierra.