Plank Firm (Firm) vs Pure Green Organic Latex (Firm)
Same feel and similar price — the Pure Green Organic Latex (Firm)'s denser foams give it the durability edge. Every number below comes from published teardowns and spec sheets (see our methodology); prices are queen-size, refreshed 2026-10-02.
Plank Firm (Firm) vs Pure Green Organic Latex (Firm): full spec table
| Spec | Plank Firm (Firm) | Pure Green Organic Latex (Firm) |
|---|---|---|
| Type | Foam | Foam |
| Firmness | 8/10 | 8/10 |
| Height | 10.5" | 9" |
| Queen price | $832 | $799 |
| Price range (all sizes) | $749–$1,532 | $799 |
| Foam densities (lb/ft³, top → bottom) | 1.5 / 2.5 / 1.8 / 1.5 | 4.5 / 4.5 |
| Coil gauge | — | — |
| Coil count (queen) | — | — |
| Cooling | 5/10 | 7/10 |
| Motion isolation | 7/10 | 6/10 |
| Edge support | 5/10 | 6/10 |
| Pressure relief | 8/10 | 7/10 |
| Support | 6/10 | 8/10 |
| Natural materials | 2/10 | 9/10 |
| Notable features | Flippable firm and extra-firm sides, Flat, ultra-firm support surface, Spinal-alignment focus for stomach sleepers, Optional cooling cover | 8" of solid natural Dunlop latex in the firm build, Organic cotton knit cover over wool batting, No polyurethane foam anywhere in the build, GOLS, Oeko-Tex and Greenguard Gold certified |
| Spec source | NapLab | Manufacturer |
Key differences
- The Pure Green Organic Latex (Firm) uses denser foam (lowest layer 4.5 vs 1.5 lb/ft³) — density is the best single predictor of how long foam lasts before it sags.
- The Pure Green Organic Latex (Firm) scores notably better for sleeping cool (7/10 vs 5/10).
Who the Plank Firm (Firm) is for
The Plank Firm (Firm) has a firm feel suited to stomach sleepers and heavier sleepers who need to keep their hips lifted.
- Excellent pressure relief at the shoulders and hips
Who the Pure Green Organic Latex (Firm) is for
The Pure Green Organic Latex (Firm) has a firm feel suited to stomach sleepers and heavier sleepers who need to keep their hips lifted.
- Strong, even support that keeps the spine aligned
- Built largely from natural materials like latex, wool, or cotton
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Frequently asked questions
Which is firmer, the Plank Firm (Firm) or the Pure Green Organic Latex (Firm)?
They rate the same: both are a 8/10 on the firmness scale, a firm feel suited to stomach sleepers and heavier sleepers who need to keep their hips lifted.
Which is cheaper, the Plank Firm (Firm) or the Pure Green Organic Latex (Firm)?
The Pure Green Organic Latex (Firm) is cheaper in a queen: $799 versus $832, as of 2026-10-02.
What is the main construction difference between the Plank Firm (Firm) and the Pure Green Organic Latex (Firm)?
Both are foam builds, but the Pure Green Organic Latex (Firm) uses meaningfully denser foam, which generally predicts better durability. Full per-layer densities 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 Plank Firm (Firm) and the Pure Green Organic Latex (Firm).