Upgrade Your Sleep · NZ-wide delivery on beds & mattresses

FirmCore Classic Super King Mattress

SKU24379
Availabilityin stock

$359.00$419.00
Tax included.Shipping calculated at checkout.
Size guide
In stock — ships from our Auckland warehouse
Most orders ship the next business day
30-day change of mind returns Terms apply
10-Year Limited Warranty What’s covered
Check shipping cost

About this mattress

The FirmCore Classic Mattress in Super King measures 183 cm x 203 cm x 20 cm. Support comes from a high-resilience pocket spring unit, every spring in its own fabric pocket, under a layer of high-density foam over a breathable comfort foam, closed underneath with non-woven fabric, which sets the feel at Firm. The mattress weighs 41 kg and is finished as a tight top.

183 x 203 cm, 20 cm deep
The widest size, at the lightest firm build.
Spring core across the full width
The support runs right out to both sides.
Soft knitted face on a firm base
Firm underneath, not hard where you touch it.
Non-woven backing underneath
The base is closed off rather than left open.
OEKO-TEX and CertiPUR-US certified, SGS tested
Certified materials, so you can rest easy.

Who this mattress suits

  • Two adults who want the most width we make.
  • Large main bedrooms with a wide wall to work against.
  • Anyone who has found a king still too narrow.

Why choose the FirmCore Classic

The FirmCore Classic is the entry point into firm support at Betalife. The core is a high-resilience pocket spring unit, and above it sit two foams doing two different jobs: a high-density layer that carries the load and keeps the surface flat, and a breathable comfort foam that softens the very top without letting you sink.

At 20 cm the whole build is spring and foam with nothing added for height. That is what keeps it the most affordable firm mattress in the range and what makes it easy to carry upstairs. The 300 gsm knitted cover is the same weight of fabric used further up the range.

The knitted cover is OEKO-TEX® STANDARD 100 certified and the foams are CertiPUR-US® certified, with SGS testing on the materials. Certificate numbers are available from our team on request.

This is the shallower of the two FirmCore builds. The Plus adds 5 cm, a spray-cotton layer and a euro top; the Classic gives you the same firm reading in a slimmer, lighter mattress.

Feel and support

Comfort levelFirm
Typically suitsStomach sleepers, and heavier body weights needing more support underneath
Support systemHR pocket springs, each in its own fabric pocket
Comfort layerHigh-density foam over breathable comfort foam, on a non-woven backing
Top styleTight top, one even surface across the mattress
Cover300 gsm knitted fabric
CertificationOEKO-TEX® STANDARD 100 cover, CertiPUR-US® foam, SGS tested

Firmness is felt, not measured. Body shape, weight and sleeping position all change how the same surface reads, so use this level to compare our mattresses with each other rather than as a promise of how it will feel to you.

Size and fit

SizeSuper King
Mattress dimensions183 cm x 203 cm x 20 cm
Mattress weight41 kg
Carton28 x 28 x 191 cm
Carton weight42.5 kg
BeddingStandard New Zealand super king fitted sheets

Roll-packed mattresses arrive compressed. Unroll it on the base, take the wrapping off and leave it to open out — it is typically at full height within 72 hours.

Features

Feature
  • FirmCore Classic Mattress in Super King, 183 cm x 203 cm x 20 cm
  • Support system: HR pocket springs, each in its own fabric pocket
  • Comfort layers: High-density foam over breathable comfort foam, on a non-woven backing
  • Tight top finish, one even surface across the mattress
  • Rated Firm on our five-level scale, so you can compare it against the rest of the range
  • 300 gsm knitted fabric over the sleeping surface
  • OEKO-TEX STANDARD 100 cover and CertiPUR-US foams, with SGS testing on the materials
  • Standard New Zealand super king fitted sheets suit this build
  • Mattress weight 41 kg
  • Roll-packed in a sealed 28 x 28 x 191 cm carton at 42.5 kg, typically at full height within 72 hours of unrolling

Specifications

Product Dimensions183 × 203 × 20 cm
Product Weight41.00kg
Material300g Knitted Fabric / High Density Foam / Breathable Comfort Foam / HR Pocket Springs / Non-Woven Fabric
Mattress FirmnessFirm
Mattress Top TypeTight Top
ColourWhite

Delivery, returns and warranty

  • Delivery — shipped from New Zealand stock. Shipping information
  • Returns — 30 days to change your mind, counted from the day you receive it. Returns policy
  • 10-Year Limited Warranty — covers manufacturing faults under normal use in the home.What’s covered

Warranty periods are in addition to, and do not limit, your rights under the New Zealand Consumer Guarantees Act 1993.

Frequently asked questions

How firm is this mattress?

It is rated Firm on our five-level scale. That level is for comparing our mattresses with each other; body shape, weight and sleeping position all change how the same surface reads.

What is inside it?

HR pocket springs, each in its own fabric pocket, under high-density foam over breathable comfort foam, on a non-woven backing, finished as a tight top. Total height is 20 cm.

What certification does this mattress have?

The knitted cover is OEKO-TEX STANDARD 100 certified and the foams are CertiPUR-US certified, with SGS testing on the materials, so both the surface against your skin and the layers underneath are covered. Certificate numbers are available from our team on request.

How does it arrive, and how long before it is at full height?

It arrives roll-packed in a sealed 28 x 28 x 191 cm carton weighing 42.5 kg. Unroll it on the base and it is typically at full height within 72 hours.

How heavy is it to move?

The super king weighs 41 kg. It is compressed for delivery, so getting it into the room is easier than moving it once it has opened out.

What sheets will fit it?

Standard New Zealand super king fitted sheets. At 20 cm this sits inside the depth ordinary fitted sheets are cut for.

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