Working out how to choose a mattress is usually the start of ending years of broken sleep and back pain nobody could explain. The right mattress isn't a luxury or a decorating decision — it's the surface you spend a third of your life lying on.
With the number of options on the market, most people get stuck between firm and soft, or between pocket springs and bonnell springs. This guide lays out how to decide.
One thing first: Sleep Station doesn't make mattresses. We make what goes on top of them — toppers, protectors and bedding. We wrote this guide because half the questions we get about back pain are really about the mattress rather than the bedding, and because in a lot of those cases a new mattress isn't what's needed.
Why the mattress matters
When you wake up heavy or sore across the lower back, the mind goes to yesterday's exertion. The mattress is usually the better suspect.
- Spinal alignment: your spine needs to keep its natural curve while you sleep. The wrong mattress bends it the wrong way and loads the vertebrae.
- Pressure relief: body weight isn't evenly distributed — shoulders and hips carry the most. A good mattress absorbs that pressure instead of pushing back against it.
- Deep sleep: less tossing and turning through the night means more time in the deep stages, which shows up the next day as focus and mood.
The types, and what they're made of
A. Pocket springs. Individual springs in fabric pockets, each moving on its own without disturbing the rest of the mattress. Movement on the other side of the bed doesn't travel, and each part of the body gets its own support. The one to look at if you share a bed.
B. Bonnell (connected) springs. An interlinked network of springs working as a single unit. Very firm, excellent for heavier weights and long-lasting, but movement travels noticeably.
C. Memory foam. Foam that responds to body heat and weight, taking the shape of your contours. The best pressure relief of the four, with a floating kind of feel — though it tends to hold heat.
D. Rebonded (medical) foam. High-density foam layers with no springs at all. Firm and solid, giving steady support for people managing disc problems on medical advice.
Firmness by sleeping position
No single mattress suits everyone: what one person finds comfortable causes another real pain. The equation is sleeping position plus body weight.
| Sleeping position | Firmness | Why |
|---|---|---|
| On your side | Soft to medium | Lets the shoulder and hip sink in without pressure |
| On your back | Medium to firm | Keeps the lower back and neck aligned |
| On your front | Firm and flat | Stops the hips dropping and the spine arching |
Body weight: under 60 kg generally needs something softer to feel supported at all; over 90 kg needs a high-density build that won't sag.
The four compared
| Pocket springs | Bonnell springs | Memory foam | Rebonded foam | |
|---|---|---|---|---|
| Motion isolation | Excellent | Poor to fair | Excellent | Excellent |
| Airflow | Excellent | Very good | Moderate (holds heat) | Moderate |
| Lifespan | 7–10 years | 8–12 years | 6–8 years | 8–10 years |
| Support | Adaptive, balanced | Solid and strong | Pressure-distributing | Firm and direct |
Two tests before you buy
Pressing down with your hand tells you nothing — a hand doesn't distribute weight the way a body does.
- Lie on it properly: in the position you actually sleep in, for at least 10 to 15 minutes.
- The hand-under-the-back test: lying on your back, slide a hand under the natural arch of your lower back. If it slides through easily, the mattress is too firm. If there's no room at all and your back is sinking, it's too soft. Light, comfortable resistance is the right level.
Do you actually need a new mattress?
Before buying a whole mattress, check what you have:
- A visible dip where you sleep, or springs you can feel through it: it's done, and replacing it is the only fix.
- Sound, but too firm, or just uncomfortable on the surface: a topper does the job for a fraction of the cost. The Hollow Fiber Mattress Topper adds a soft layer over a hard mattress; the Medical Foam Mattress Topper fills the gaps under your back.
- New, and you want to keep it that way: the Waterproof Mattress Protector keeps out liquids, dust and dust mites, and costs far less than replacing a mattress early.
Making it last
- Rotate it every three months so the load spreads evenly and dips don't form.
- Use a protector against liquids, dust and the dust mites that trigger allergies.
- Air it out regularly — uncovering the mattress and ventilating the room drives moisture out of the fill.
In short
Choosing a mattress decides how each day starts. Pick the type that matches your weight and sleeping position — and if the mattress you have is still sound, look at mattress toppers and mattress protectors before you replace it.