MastersHow to Choose a Mattress Topper (Memory Foam, Latex and More)
In this guide
To pick the right mattress topper, start with the problem you are solving. If your mattress is too firm, choose a 2 to 3 inch soft memory foam or latex topper. If you sleep hot, choose gel-infused foam, latex or wool. If you just want a little extra cushioning, a 1 to 2 inch topper is enough. And if your mattress is sagging, a topper will not fix it; that is a sign it is time to replace the mattress.
Key takeaways
- Thickness: 1–2 inches adds a softer feel; 3–4 inches changes the feel dramatically and suits side sleepers on a firm mattress.
- Material: memory foam hugs, latex is buoyant and cool, wool regulates temperature, fibre is soft but compresses quickly.
- Density: for memory foam, 3–5 lb/ft³ lasts far longer than cheap 2 lb foam.
- Always cover a topper with a fitted protector; it is harder to clean than your sheets.
- Toppers fix comfort, not support. A sagging mattress needs replacing.
When a topper makes sense (and when it does not)
| Your problem | Will a topper help? | Best choice |
|---|---|---|
| Mattress feels too firm | Yes | 2–3 in soft memory foam or soft latex |
| Shoulder or hip pressure on your side | Yes | 3 in memory foam or latex |
| Sleeping hot | Often | Latex, wool or gel-infused foam (avoid dense traditional memory foam) |
| Guest bed or dorm mattress needs a lift | Yes | 2 in memory foam |
| Mattress too soft | A little | Firm latex topper, 2 in |
| Visible sag or body impressions | No | Replace the mattress |
| Waking up with back pain on an old mattress | Rarely | Replace the mattress |
How to choose a mattress topper
1. Pick the material
- Memory foam: the most popular choice. Deep contouring and pressure relief, slow-moving feel. Choose gel-infused or open-cell foam if you run warm.
- Latex: responsive and buoyant, sleeps cool, very durable. Available soft, medium and firm, so it can soften or slightly firm up a mattress.
- Wool: a thin, breathable layer that regulates temperature and wicks moisture; adds softness but not much contouring.
- Down and fibre (featherbeds): plush and inexpensive, but compress quickly and need regular fluffing.
2. Choose the thickness
Toppers usually come in 1 to 4 inch thicknesses. One to two inches softens the surface without changing the character of your mattress. Three to four inches effectively gives you a new comfort layer, which suits side sleepers on a firm mattress. Thicker toppers add height, so check your fitted sheets have deep enough pockets.
3. Check the density or ILD
For memory foam, density (lb per cubic foot) predicts durability: 3 lb is the minimum for daily use, and 4 to 5 lb holds its shape for years. For latex, look at the firmness rating (ILD): lower numbers are softer. Very cheap toppers are almost always low-density foam that flattens within months.
4. Think about temperature
A thick memory foam topper on top of a memory foam mattress can trap heat. If you already sleep warm, choose latex or wool, or a gel-infused, ventilated foam topper, and pair it with breathable cotton or bamboo sheets.
5. Make sure it stays put
Look for a topper with a removable, washable cover and corner straps or a non-slip base. Then cover it with a fitted mattress protector to keep it clean.
Topper vs. new mattress: the cost question
A quality topper costs a fraction of a new mattress, which makes it an excellent fix for a mattress that is supportive but the wrong comfort level. But a topper laid over a sagging mattress simply follows the sag. If your mattress is over 8 years old, has visible dips or you wake up sore, a new mattress is the better investment. Read how long a memory foam mattress lasts to judge where yours is.
Showroom tip: if you are buying a new mattress and planning to add a topper straight away, try a model with a pillow top or Euro top instead. A built-in comfort layer will not shift, and it is covered by the mattress warranty.
Want a softer feel without a topper? See how to make a memory foam mattress softer. Browse protectors and toppers in our accessories.
When it is time for a new mattress
Answer five quick questions and the Mattress Selector will suggest three mattresses with the comfort level you are trying to add.
Frequently asked questions
What thickness of mattress topper should I get?
Two to three inches suits most people. One inch adds a subtle softness; three to four inches is best for side sleepers who need pressure relief on a firm mattress.
Is a memory foam or latex topper better?
Memory foam gives deeper, hugging pressure relief; latex is cooler, bouncier and more durable. Hot sleepers and combination sleepers usually prefer latex.
Can a mattress topper fix a sagging mattress?
No. A topper conforms to the surface beneath it, so it will follow the sag. It can improve comfort on a supportive mattress, but not restore lost support.
Do mattress toppers make you hot?
Dense traditional memory foam toppers can. Gel-infused or open-cell foam, latex and wool toppers sleep noticeably cooler.
How long does a mattress topper last?
Quality memory foam and latex toppers last 3 to 5 years or longer; fibre and down toppers often need replacing in 1 to 3 years.
