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Cozey Hybrid Mattress: Coils, Edge Support and Sizes

A plain guide to our Hybrid Mattress: what is inside its 30.5 cm build, how many coils each size has, how the reinforced foam edge works, and the sizes, trial and warranty in Australia.

Updated 9 November 20266-min ReadCozey Editorial
A Cozey hybrid mattress

Short answer: Our Cozey Hybrid Mattress is a 30.5 cm (12 inch) medium-firm mattress with 15 cm (6 inches) of zoned pocket coils: 486 in a Full, 609 in a Queen and 754 in an Australian King. It comes with a 100-night trial and a 15-year warranty.

The coils sit under a foam comfort layer, with reinforced foam edge support around them, and the mattress comes in Full, Queen and King. We built the Hybrid for people who want more bounce, more airflow and a firmer edge than an all-foam bed gives. This guide stays on the Hybrid itself. If you are still deciding between coils and foam, our foam vs hybrid mattress guide compares the two types.

On This Page

  1. What is inside the Cozey Hybrid Mattress?
  2. How many coils does it have, and how do they work?
  3. What is the reinforced foam edge?
  4. How tall is it, and what sizes do we offer?
  5. How firm is it, and who is it for?
  6. What base does it need, and how do you set it up?
  7. Our recommendation
  8. Explore our bedroom range

What is inside the Cozey Hybrid Mattress?

A quilted polyester cover sits over the foam and coil layers. The mattresses we sell in Australia are made in China.

What is inside the Cozey Hybrid Mattress?

Layer (top to bottom)What it does
Comfort foamThe layer you feel first. It contours to shoulders and hips and eases pressure.
Transition foamFirmer than the comfort layer, so you move into support gradually.
Zoned pocket coils, 15 cm (6 inches)The core. They give the bed its bounce and let air move through the mattress.
Reinforced foam edgeA foam border around the coils that keeps the sides firm.
Base foamA stable bottom for the coils to sit on.

The foam in the Hybrid is CertiPUR-US compliant, which means it is tested for formaldehyde, lead, phthalates and low VOC emissions. The cover is spot clean only.

How many coils does it have, and how do they work?

The coil count depends on the size: 486 in a Full, 609 in a Queen and 754 in an Australian King. The coils are individually wrapped, so each one moves on its own instead of pulling its neighbours along. They are arranged in three comfort zones, and we do not publish how the zones are laid out.

The coil layer is what makes the Hybrid sleep differently from our Foam Mattress. Fifteen centimetres of coils leave open space inside the mattress, so heat has somewhere to go. You also sit a little higher in the bed and roll over with less effort.

What is the reinforced foam edge?

The edge is a border of reinforced foam around the coil layer. Its job is to keep the side from collapsing when you sit on it.

That means you can sit on the edge to put on socks without sliding off. It is the main reason we recommend the Hybrid over the Foam Mattress for anyone who sits on the side of the bed often. Our Foam Mattress has a standard foam edge, so it softens more under a seated person.

How tall is it, and what sizes do we offer?

The Hybrid is 30.5 cm (12 inches) tall in every size, 5 cm taller than our 25.4 cm (10 inch) Foam Mattress. Look for fitted sheets with pockets of at least 30.5 cm.

How tall is it, and what sizes do we offer?

SizeWidth x length x heightCoils
Full133.4 x 189.2 x 30.5 cm (52.5 x 74.5 x 12 inches)486
Queen151.1 x 201.9 x 30.5 cm (59.5 x 79.5 x 12 inches)609
King (Australian)183 x 201.9 x 30.5 cm (72.0 x 79.5 x 12 inches)754

Check the size before you order, because our labels are North American. Our Full is 133.4 cm wide and 189.2 cm long, so it is not the same as an Australian Double, which is commonly 138 x 188 cm. Our Queen is slightly smaller than the common Australian Queen of 153 x 203 cm, while our King is 183 cm wide. Each mattress ships rolled in one box, and two people make a Queen or King easier to carry. A 30.5 cm bed also sits higher on a low frame, so our guide to the best mattress for a low-profile or platform bed helps you check the height.

How firm is it, and who is it for?

The Hybrid is medium-firm, about 6 to 6.5 out of 10, and it is firmer than our Foam Mattress. It is soft enough on top to take pressure off shoulders and hips and supportive enough underneath to keep the lower back from sagging, which suits back and side sleepers.

It tends to suit:

  • Hot sleepers. The open coil layer gives heat more room to escape than a solid foam core.
  • Combination sleepers. The bounce makes changing positions easier.
  • People who sit on the bed. The reinforced edge stays firm.

It is a weaker fit if you want the deepest sink and the least motion transfer, because our Foam Mattress absorbs more movement. It is rated for up to 113 kg per sleeper, and above that most people get better long-term support from a thicker or firmer mattress.

What base does it need, and how do you set it up?

We suggest a solid platform, or a slatted base with slats at least 5 cm (2 inches) wide and gaps no wider than 7.6 cm (3 inches). Queen and King sizes need a centre support beam. Wire grid or coiled box springs are not compatible. On our Ara bed, the mattress rests directly on the slats, and our guide on whether the Ara works with your mattress covers thickness and slat spacing.

Setup takes a few minutes of work and a short wait:

1. Bring the box into the bedroom before opening it.

2. Use the bag cutter to open the wrap, then unroll the mattress flat on your base.

3. Carefully cut the plastic bag and slide it off.

4. Give it 24 to 48 hours to reach full shape.

The cover is spot clean only, so a mattress protector is worth having. Rotate the mattress head to foot every four to six months, and do not flip it.

Our recommendation

Choose the Hybrid if you sleep hot, move around at night, sit on the edge of the bed, or need an Australian King. Choose our Foam Mattress if a still, cradling feel matters more to you. If your frame is low, measure first, since the Hybrid is the taller of the two.

Explore our bedroom range

Product specifications can change. Check the current dimensions on the product page before ordering.

Frequently Asked Questions

The coil count depends on the size. Our Full has 486 coils, our Queen has 609 and our Australian King has 754. The coils are individually wrapped and sit in a 15 cm (6 inch) layer, so each one moves on its own. They are arranged in three comfort zones. That gives the mattress its bounce and lets air move through the core, which is a big part of why it feels so different from our all-foam mattress.


The Hybrid has reinforced foam edge support around the coil layer. It keeps the side of the mattress from collapsing when someone sits on it, so the edge stays firm for putting on socks or getting up. Our Foam Mattress has a standard foam edge, which softens more under a seated person, so the Hybrid is the better pick if you sit on the side of the bed often. We do not publish a width or depth for the edge foam in Australia, so check the product page if you need more detail before ordering.


The Hybrid is 30.5 cm (12 inches) tall in every size, which is 5 cm taller than our 25.4 cm Foam Mattress. That height is worth checking against your frame, because a thicker mattress raises the sleeping surface and covers more of the headboard. Use fitted sheets with pockets of at least 30.5 cm. On a low platform frame, measure from the top of the base to the top of the side rail to see how much of the mattress will rise above it.


We offer the Hybrid in Full, Queen and King, all 30.5 cm (12 inches) tall. The Full is 133.4 x 189.2 cm (52.5 x 74.5 inches), the Queen is 151.1 x 201.9 cm (59.5 x 79.5 inches) and the King is 183 x 201.9 cm (72.0 x 79.5 inches). Our labels are North American, so our Full is not an Australian Double and our Queen is a little smaller than the common Australian Queen. Measure your frame, or pair it with our Ara bed.


It is medium-firm, around 6 to 6.5 out of 10, which makes it firmer than our Foam Mattress. The comfort foam on top lets shoulders and hips sink in a little, while the coils and foam beneath keep your spine aligned, so it suits both back and side sleepers. It comes in one firmness, so it is not the right mattress if you know you need a very soft or very firm bed. It is rated for up to 113 kg per sleeper.


It is the one of our two mattresses that we suggest for hot sleepers. Foam holds more warmth than a coil core, and the 15 cm (6 inch) coil layer leaves open space inside the mattress so heat has somewhere to go. It does not change the room, so a cool bedroom and breathable bedding still help. If you prefer a cradling feel and do not run warm, our Foam Mattress may suit you better, because it absorbs more motion.


You have a 100-night trial. If it is not the right fit, we pick it up for free, and the product page explains the steps. The mattress also has a 15-year warranty covering defective parts that are not related to consumer-caused damage or modifications. The base you use affects the warranty, so use a solid platform or a slatted base that meets the slat width and gap limits, and add a centre support beam for Queen and King. Our warranty page has the full terms.


No. We suggest a solid platform, or a slatted base with slats at least 5 cm (2 inches) wide and gaps no wider than 7.6 cm (3 inches). Wire grid or coiled box springs are not compatible, and Queen and King sizes need at least one centre support beam. On our Ara bed, the mattress rests directly on the slats, so you do not add anything underneath. Because the Hybrid is 30.5 cm tall, check how much of the headboard it will cover before you order.

Explore Cozey's Ara Bed

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