How to Choose a Mattress in New Zealand When You Can't Lie on It First
Short answer
Almost every mattress guide ends with the same advice: go to a shop and lie on one for fifteen minutes. That is not much use if you are buying online, and a showroom test tells you less than people think. You can judge a mattress without lying on it — but you have to work from a published firmness number, the build underneath, the base you already own, and the returns terms, in that order.
How to judge a mattress you can’t lie on first
The showroom test has a real flaw even when you can do it: fifteen minutes on your back, in shoes, in a bright room, with a salesperson beside you, is nothing like a night’s sleep. People routinely buy a mattress that felt wonderful in store and wrong at 3am.
So whether you are buying online or standing in a shop, the same four checks do more work than the lie-down:
- Get a firmness number, not an adjective. “Medium firm” is not a standard and means different things in different shops. A published figure can be compared.
- Find out what is underneath the surface. The comfort layer decides how it feels this year; the support core decides whether it is still flat in year seven.
- Check the base you already have. A new mattress copies the shape of whatever it lies on. This is the most common preventable failure.
- Read the change-of-mind terms before you order. How long, whether you may open and sleep on it, refund or credit, who pays the freight back.
The rest of this guide is those four checks in detail, plus size, price, children and couples.
Size: settle this before anything else
Size is the one decision that is hard to undo and easy to get right, because it is arithmetic rather than taste. It is driven by two things: how many people sleep in the bed, and how much floor the room can spare once the bed is in it.
| Size | Suits | Worth knowing | Browse |
|---|---|---|---|
| Single | One child or one adult, small rooms | Outgrown faster than parents expect | Single |
| King single | Teenagers, taller single sleepers | Longer and wider than a single; the usual upgrade | King single |
| Double | One adult who likes room; two at a squeeze | Two adults get less width each than a single bed | Double |
| Queen | Most couples | The practical minimum for two adults long-term | Queen |
| King | Couples with space, or with children and pets joining | Check the doorway and stairwell, not just the room | King |
| Super king | Couples who want maximum separation | Bedding is harder to find and costs more | Super king |
Work out the floor space before you commit — a bigger bed changes the room you can still walk through. We covered the measuring side separately in the room-fit guide.
Firmness: get a number, not an adjective
This is the decision people most often get wrong, and the hardest to fix afterwards. The problem is that the vocabulary is useless: there is no industry body defining “medium firm”, so two mattresses carrying the same word can feel a long way apart.
A published numeric rating fixes that. Betalife uses a 1–10 scale where 10 is the softest, and most products in the range publish their own figure on the product page.
| Feel | Typical rating | What the surface does | Models | Browse |
|---|---|---|---|---|
| Firm | 2.0 – 3.0 | Very little surface give; you rest on top of it | 89 | Firm |
| Medium firm | 4.0 – 4.5 | A little cushioning over a supportive base | 73 | Medium firm |
| Medium | 5.0 – 5.5 | Noticeable give without sinking | 48 | Medium |
| Medium plush | 6.0 | The most contour in the range | 9 | Medium plush |
How to use the number
Start from the bed you sleep on now. If it is close but not right, move one band, not two — the gap between a 3.0 and a 4.5 is larger than the gap between two products both labelled “firm”. If you have no reference point, start in the middle, because that is the easiest position to adjust later.
Two things shift how a surface reads. Body weight: the same mattress feels firmer to a lighter person and softer to a heavier one, so two people of different builds will not experience the same number identically. Temperature: foams soften slightly with warmth, so a mattress feels firmer in a cold showroom than it will in your bedroom.
Match the firmness to how you actually sleep
Sleeping position matters because it changes where your weight concentrates, which changes how much surface give you want.
| You mostly sleep | Why it changes things | Lighter build | Heavier build |
|---|---|---|---|
| On your side | Weight lands on shoulder and hip — two small areas | Medium plush | Medium |
| On your back | Weight spreads; hips are the heaviest point | Medium | Medium firm |
| On your front | Hips dropping lower than the chest is the thing to avoid | Medium firm | Firm |
| A bit of everything | You need a surface that is easy to move on | Medium | Medium firm |
Treat this as a starting point, not a rule. If you are choosing a mattress for a specific medical reason, that is a conversation with your doctor or physio rather than with a retailer.
Worth noting if you land in the firmer half: that is where the range is deepest — 162 of the 219 rated models sit in Firm or Medium firm, so there is plenty to choose between without compromising elsewhere.
What is actually inside a mattress
Every mattress is two jobs stacked on top of each other, and most of the confusion in this category comes from mixing them up.
| Comfort layer (top) | Support core (underneath) | |
|---|---|---|
| Its job | How the surface feels in the first few centimetres | Holding your weight evenly for years |
| Usually made of | Memory foam, gel foam, latex, wool or bamboo-blend fibre | Pocket springs, Bonnell springs, or high-density foam |
| What it decides | Firmness, contour, surface temperature | Sag resistance, edge support, motion transfer |
| What fails first | Softens and flattens | Sags in the middle |
Why a “memory foam mattress” usually has springs in it
When a retailer names a mattress after a material, they are nearly always naming the comfort layer. A “memory foam mattress” typically means memory foam over a spring core; a “latex mattress” usually means a latex comfort layer over springs. That is standard practice across New Zealand retail rather than a trick — but it means the name tells you how it feels, not how it is built. We went into that in more depth in the latex guide.
| Core | How it behaves | Best for | Browse |
|---|---|---|---|
| Pocket spring | Each coil moves independently, so movement stays local. Good airflow. | Most people, especially couples | Pocket spring |
| Bonnell spring | Coils linked together; the surface responds as one unit. Simple and long-serving. | Spare rooms, rentals, lighter use | Bamboo range |
| Solid foam | No coils. Lighter, quieter, easier to carry and store. | Trundles, bunks, guests, temporary beds | Folding foam |
On the comfort side, briefly: memory foam contours slowly and holds the shape; latex springs straight back and sleeps cooler; gel-infused foam is memory foam engineered to hold less heat; bamboo-blend covers are about the surface against your skin rather than the support below it.
Two people, one mattress
Most buying guides quietly assume one sleeper. Most mattresses are bought by two people, and the things that go wrong are different.
Buy wider before you buy better. Two adults on a double get less width each than a single bed gives one person. Moving from double to queen is the single biggest improvement most couples can make, and it usually costs less than moving up a model tier.
Movement travels through the core, not the top. If one of you gets up early or turns a lot, the support core decides whether the other one feels it. Independently pocketed coils keep movement local; linked coils pass it across. A soft comfort layer will not fix a linked core — it reduces the movement you feel rather than removing it.
Edge support is a couples feature. On a narrower bed people end up sleeping closer to the edges, and a mattress that collapses at the perimeter effectively gets smaller at night.
If the two of you disagree about firmness
Buy for the firmer preference and soften one side with a topper. It only works in that direction: you can add cushioning to a supportive mattress, but you cannot add support to one that is too soft. A topper costs a fraction of a second mattress and can be removed if you change your mind. The same logic applies to pillows — cheap to change, and worth getting right individually rather than matching.
Choosing for children and teenagers
This gets the least attention of any part of the category, and the decisions are genuinely different from choosing for an adult.
For cots, the priorities are fit and firmness, in that order. A cot mattress should fit the cot frame with no gap at the sides, and it should be firm. Cot mattresses are not chosen on the adult comfort scale at all, and a topper should never be added to a cot mattress.
For school-age children, the thing parents underestimate is how fast a single is outgrown. A king single is longer and wider for a small step up in price, and it stays useful into the teenage years and afterwards as a guest bed.
For bunks and trundles, height is a constraint rather than a preference. A deep mattress on a top bunk raises the sleeper relative to the safety rail, so check the bed’s stated maximum mattress depth before ordering. Folding foam and slimmer builds exist for exactly this. Depth limits are listed on the bunk bed and kids’ bed product pages.
The base underneath is part of the decision
A mattress can only stay as flat as the thing it lies on. This is the most common cause of a mattress that “went bad” within a couple of years, it is almost always preventable, and most warranties exclude damage caused by an unsuitable base — so it affects your cover as well as your sleep.
| Base | Works with | Check before you order |
|---|---|---|
| Slat base | Everything, if the slats are sound | No cracked, bowed or missing slats; evenly spaced |
| Solid platform | Everything | Some airflow underneath; a sealed box can trap moisture |
| Storage or gas-lift base | Everything | That the mechanism still holds the platform level |
| Old base, new mattress | Risky | If the base is older than the mattress you are replacing, replace both |
Two more things worth measuring. Total height: a deep mattress on a tall bed frame can end up noticeably higher than the bed you are used to climbing into. And sheet depth: deeper mattresses need deep-fitted sheets, a small cost people forget until the first night.
If you are replacing the frame too, the main choices are platform, storage, gas lift, wooden and upholstered — and it is worth choosing frame and mattress together rather than separately.
What protects you after it arrives
Three separate things protect you once the mattress is in your bedroom, and they cover completely different problems. People tend to find out which is which at the worst possible moment.
| Covers | Does not cover | Time limit | |
|---|---|---|---|
| Change of mind | You tried it and it is not right for you | Damage, or a mattress you kept too long | Short — days or weeks |
| Warranty | Manufacturing faults and premature sagging | Simply not liking the feel | Long — years |
| Consumer law | Goods not fit for purpose or not as described | Buyer’s remorse | Reasonable period |
Read the change-of-mind terms before you order, because retailers differ enormously and the differences only become visible when you need them. Four things to check: how long you have, whether you may open and use the mattress, whether you get money back or store credit, and who pays to send it back.
Betalife’s terms, so you can hold anyone else’s up against them: you have 30 days from delivery to request a change-of-mind return, and you may open the mattress and sleep on it — normal trial use does not void an eligible return. Contact us first so we can approve it and give you the return address. Approved mattress returns are issued as Betalife store credit equal to what you paid for the mattress, valid one year, rather than a card refund. Return transport is arranged and paid by you with a carrier of your choice, and an expanded mattress has to travel at its expanded size. Processing takes 10–15 working days from when it reaches us.
On warranty, the number is easy to compare and the terms are not. Every Betalife mattress carries a 10-year limited warranty, the exception being the portable folding range at 2 years. Across the industry, what a mattress warranty generally covers is manufacturing faults and sagging beyond a stated depth; what it generally does not cover is a mattress used on an unsuitable base.
On materials: Betalife mattress covers are OEKO-TEX STANDARD 100 certified and the foams are CertiPUR-US. Certificate and report numbers are available from our team on request.
What it costs in New Zealand
There is no price at which mattresses suddenly become good, but there are recognisable bands. These are Betalife’s own prices as at October 2026, which sit in the mainstream rather than the premium end of the market.
| Band | Queen | What you get |
|---|---|---|
| Entry | $189 – $309 | Solid foam or Bonnell spring. Spare rooms, rentals, short-term use. |
| Mainstream | $309 – $499 | Pocket spring core, zoned support, a named comfort layer. |
| Upper | $499 – $709 | More coils, deeper comfort layers, taller build. |
Across all sizes the range runs from $109 for a folding single to $899 for the deepest super king. Current pricing is always on the size pages, and anything discounted sits in sale.
Where the money is best spent: for couples, going up a size beats going up a tier. And spending on the support core outlasts spending on the comfort layer, because the core is what fails last. If your current mattress still supports you and is only the wrong feel, spend on a topper instead and keep the mattress.
Before you click buy
- Measure the room, the doorway and the stairwell. Corners are where deliveries fail.
- Check the base. Cracked or bowed slats will show through a new mattress within months.
- Write down the firmness number you bought, so you have a reference point next time.
- Read the change-of-mind terms — length, whether you can open it, refund or credit, who pays freight.
- Buy deep-fitted sheets if the mattress is 30 cm or more.
- Allow settling time. A roll-packed mattress is typically at full height within 72 hours.
Common questions
How do I choose a mattress if I can’t lie on it first?
Work from a published firmness number rather than a showroom impression — fifteen minutes in a shop predicts a night’s sleep poorly anyway. Note the rating of the bed you sleep on now, decide whether you want firmer or softer, move one band, and check the change-of-mind terms before you order so you have a way back.
What firmness should I choose?
Start from sleeping position: side sleepers usually want the softer half of the scale, front sleepers the firmer half, back sleepers the middle. Then adjust for build, because the same mattress reads firmer to a lighter person. If you have no idea, start in the middle — a topper can move it softer later, but nothing can move it firmer.
What’s the difference between pocket spring and Bonnell spring?
Pocket springs are individually wrapped so each coil moves on its own, which stops one person’s movement travelling across the bed. Bonnell coils are wired together, so the surface responds as a unit. Pocket is the better choice for couples; Bonnell is a sound, economical core for spare rooms and lighter use.
Is memory foam or spring better?
They usually are not alternatives — most memory foam mattresses sold in New Zealand are memory foam over a spring core. The real choice is what the comfort layer does: memory foam contours slowly and holds your shape, latex springs straight back, gel-infused foam holds less heat. The core underneath is a separate decision from the surface.
How much should I spend on a mattress in NZ?
Enough to get a pocket-spring core if the bed is slept in nightly, which in the Betalife range starts around $309 for a queen. Below that you are into foam and Bonnell builds, which are fine for spare rooms and rentals. Above roughly $500 a queen you are buying more coils and deeper comfort layers rather than a different category.
What size mattress should two people get?
Queen at minimum if the room allows it. Two adults sharing a double get less width each than one person gets in a single bed. Going up a size usually improves sleep more than going up a price tier, and it costs less. King and super king buy more again if the floor space and the doorway allow it.
What mattress should I buy for a child?
For a cot, fit and firmness come first: no gap at the sides of the cot frame, a firm surface, and never a topper on top. For school-age children, a king single is longer and wider than a single for a small step up in price and stays useful for years. For bunks, check the bed’s stated maximum mattress depth.
Does the bed base really matter?
Yes, and it is the most common preventable cause of a mattress failing early. A mattress can only stay as flat as what it lies on, so cracked slats or a sagging old ensemble will telegraph through a new mattress within months. Most warranties also exclude damage caused by an unsuitable base, so it affects your cover too.
How long does a mattress last?
It depends far more on the support core and the base under it than on the comfort layer on top. Rather than comparing lifespan claims, compare warranties — one is an adjective and the other is a document. Betalife mattresses carry a 10-year limited warranty, other than the portable folding range at 2 years.
Can I return a mattress in New Zealand if I don’t like it?
It depends entirely on the retailer, so check before ordering rather than after. With Betalife you have 30 days from delivery to request a change-of-mind return and you may open and sleep on the mattress first. Approved returns are issued as store credit rather than a card refund, and you arrange and pay the return transport.
What does a mattress warranty actually cover?
Manufacturing faults and sagging beyond a stated depth — not disliking the feel, which is what the change-of-mind window is for. Most warranties across the industry also exclude damage caused by an unsuitable or failing base, which is why checking your slats before delivery is worth the five minutes it takes.
Should I buy a topper instead of a new mattress?
If the mattress still supports you but feels too firm, a topper is the cheaper and reversible fix. If it dips in the middle, no — a topper follows the dip and hides the problem rather than solving it. Surface problems take a topper; support problems take a new mattress.
