The "best" mattress is the one that keeps your spine neutral in the position you actually sleep in. Get that right and most of the marketing noise stops mattering.
Start with your sleeping position
- Side sleepers need a softer surface (roughly 4–6/10 firmness) that lets shoulders and hips sink in while supporting the waist.
- Back sleepers do best on medium-firm (5–7/10) with solid lumbar support.
- Stomach sleepers need firmer support (7–8/10) to stop hips sagging and arching the lower back.
- Combination sleepers should favour responsive materials — latex or hybrids — that make changing position easy.
Materials in plain English
Memory foam contours and isolates motion but can sleep warm and feel "stuck". Latex is bouncy, durable and naturally cool, at a higher price. Hybrids combine pocket coils with foam or latex layers — the best all-rounder for most people. Innerspring is breathable and affordable but transfers motion.
Weight, partners and temperature
Heavier sleepers (over ~105kg) should look for reinforced coils or high-density foam. Couples should prioritise motion isolation and edge support. Hot sleepers should avoid dense all-foam beds or choose models with cooling covers.
Use the trial — properly
Every brand in our mattress comparison offers at least a 100-night home trial. Your body needs 3–4 weeks to adapt to a new surface, so do not judge a mattress by the first few nights.