The Best Mattress for Side Sleepers
Side sleeping is the most common position, and it puts the most concentrated pressure on two spots: your shoulder and your hip. The right mattress lets those areas sink in just enough to keep your spine straight, while still supporting the gap at your waist.
Get it wrong and you wake up with a sore shoulder or a numb arm. Get it right and your spine stays neutral all night.
What to look for
- Softer-to-medium firmness — roughly 4–6 out of 10 for average-weight sleepers
- Strong pressure relief at the shoulders and hips (deeper contouring, not a flat slab)
- Memory foam or a foam-topped hybrid for cushioning where you need it
- Enough support underneath so your hips do not bottom out
Why firmness matters most for side sleepers
When you lie on your side, your shoulder and hip carry your body weight on a small surface area. A mattress that is too firm pushes back against those points and forces your spine into a curve; one that is too soft lets your midsection sag. Most side sleepers do best somewhere in the medium range — soft enough to cradle the shoulder and hip, firm enough to keep everything aligned.
Your weight shifts the target. Lighter sleepers need a softer surface to get any contouring at all, while heavier side sleepers need a touch more firmness and support so they do not sink through to the hard base.
Materials that relieve pressure
Memory foam and latex both excel at spreading pressure across the shoulder and hip rather than concentrating it. A foam comfort layer over a supportive coil or high-density base — a hybrid — is a reliable combination: plush on top, stable underneath. If you sleep hot, look for a cooling cover or coils that move air, since plush foam can trap heat.
Frequently asked questions
What firmness is best for side sleepers?
Most side sleepers are happiest with a medium to medium-soft mattress, roughly 4 to 6 on a 10-point firmness scale. Lighter sleepers lean softer; heavier sleepers lean a little firmer for extra support.
Is memory foam or a hybrid better for side sleeping?
Both work well. Memory foam gives the deepest pressure relief at the shoulder and hip, while a foam-topped hybrid adds bounce, edge support, and cooling airflow from its coils. The best choice depends on whether you prioritize deep contouring or a more supportive, temperature-neutral feel.
Can a side sleeper use a firm mattress?
Usually not comfortably. A firm surface pushes back against the shoulder and hip and pulls the spine out of alignment, which leads to pressure points and numbness. Side sleepers almost always do better with added cushioning on top.