Pillow Firmness
Firmness describes how hard a pillow pushes back. It is not height, it is not density, and no two brands scale it the same way.
By the Somnora editorial team · Last updated September 1, 2026
Firmness, loft and density are three things
| Property | What it measures | Why it matters |
|---|---|---|
| Firmness | Resistance to compression | Determines whether the stated loft survives your body weight |
| Loft | Height under load | Determines head and neck position |
| Density | Material per unit volume | Correlates with durability and, in foam, with support over time |
Matching firmness to your situation
- Firm — broad shoulders, side sleeping, firm mattress, or a history of pillows going flat.
- Medium-firm — the most common recommendation for side and combination sleepers.
- Medium — back sleepers who want a neck contour without much head elevation.
- Soft — stomach sleeping, low-loft needs, or as a top layer over a firmer pillow.
Why labels are unreliable
There is no shared firmness scale in the pillow industry. One brand's "medium" is another's "firm". Where a brand publishes a measurable specification — foam density, fill weight, loft in inches — treat that as more informative than the adjective.
If your pillow keeps going flat
That is a firmness and durability problem more than a loft problem. A taller soft pillow will simply compress further. Look instead at firm pillows or a denser memory foam or latex construction.