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Firm Mattresses Compared & Scored (2026)

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A firm mattress holds the spine in a flatter, more level posture and prevents the hips from sinking past the line of the shoulders. That makes it the conventional pick for heavier sleepers (over roughly 100kg / 16 stone), front sleepers, and anyone whose lower back aches after a night on a softer bed.

Firmness on this listing reflects the manufacturer's own tension rating where supplied. Tension is subjective and not interchangeable with build quality, so the BedBoy Score on each card weights customer reviews, durability indicators and price-per-night separately. Sort by score using the dropdown above the grid to surface the strongest-reviewed firm options first.

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