FORM Core vs Polysleep Luna
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.
FORM Core vs Polysleep Luna: full spec table
| Spec | FORM Core | Polysleep Luna |
|---|---|---|
| Type | Foam | Foam |
| Firmness | 6/10 | 6/10 |
| Height | 9" | 12" |
| Queen price | $1,399 | $1,375 |
| Price range (all sizes) | $1,149–$1,899 | $1,045–$1,595 |
| Foam densities (lb/ft³, top → bottom) | 1.7 / 1.6 | 3.0 / 1.8 / 1.8 |
| Coil gauge | — | — |
| Coil count (queen) | — | — |
| Cooling | 6/10 | 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 | 3/10 | 2/10 |
| Notable features | GelGrid pressure-relief surface, Purple-style gel grid over foam, Medium-firm supportive feel, Launched 2026 by FORM | Antimicrobial foam surface, Ventilated comfort foam, Medium-firm all-foam feel, Canadian-made value |
| 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 FORM Core is for
The FORM Core has a medium feel that works for many side and back sleepers, and for combination sleepers who switch positions.
Who the Polysleep Luna is for
The Polysleep Luna 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
SquishMat may earn a commission if you buy through links on this page, at no extra cost to you. Commissions never influence which mattresses we recommend. How we make money
Frequently asked questions
Which is firmer, the FORM Core or the Polysleep Luna?
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 FORM Core or the Polysleep Luna?
The Polysleep Luna is cheaper in a queen: $1,375 versus $1,399, as of 2026-09-04.
What is the main construction difference between the FORM Core and the Polysleep Luna?
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 FORM Core and the Polysleep Luna.