Short answer: The most comfortable mattress for a low-profile bed is the one that matches how you sleep without adding height you do not want. Our Cozey Foam Mattress is 10 inches (25 cm) tall and keeps a low bed low. Our Cozey Hybrid Mattress is 12 inches (30.5 cm) tall, with more bounce and a firmer edge. You do not need a box spring on a platform bed such as our Ara, because the slats already do that job.
On a low frame the mattress is most of what you see and most of what sets the height of the bed. A few inches change how easy it is to get in and out, how much of the headboard shows and whether the base can hold the mattress properly. The sections below cover each of those in turn.
On This Page
- What does a low-profile bed change?
- How thick should the mattress be on a platform bed?
- Foam or hybrid on a low bed?
- What should the slats and base look like?
- Do you need a box spring with a platform bed?
- Our recommendation
- Explore our bedroom collection
What does a low-profile bed change?
A low-profile or platform bed has a flat, slatted or solid surface built in, so there is no box spring under the mattress. The total height of the bed is the frame plus the mattress, which makes the mattress the part you can choose.
Three things change on a low bed:
- Sleeping height: a thinner mattress keeps the bed closer to the floor. As general advice, a lower bed suits people who like to step on and off easily, and a taller one suits people who prefer to sit higher.
- Headboard show: a thick mattress covers more of the headboard. Our Ara headboards are about 35 inches (89 cm) tall for Round and Square, 36.6 inches (93 cm) for Pillow and 40 inches (102 cm) for Extended.
- Support under the mattress: with no box spring, the slats carry the load, so their width and spacing matter.
Our Ara frame has a mattress space 4.9 inches (12.5 cm) deep, measured from the top of the slats to the top of the side panel. The Foam Mattress therefore rises roughly 5.1 inches (12.9 cm) above the panel, and the Hybrid roughly 7.1 inches (18 cm).
How thick should the mattress be on a platform bed?
Choose a thickness that suits the frame and the look you want. For our Ara bed, we recommend a mattress of about 9 inches (22.9 cm) or more for balanced proportions, and mattresses up to 16 inches (40.6 cm) are compatible. Both of our mattresses sit inside that range, so neither one is too thin or too thick for Ara. Our guide to Ara and your mattress explains the thickness range in full.
For any other low frame, the right thickness is the one that frame allows. Check the frame's own instructions before you buy.
Foam or hybrid on a low bed?
Both mattresses are medium-firm and share the same 2 inch (5 cm) Serene comfort layer, so the difference comes from height and the core. Our foam and hybrid comparison covers every detail. This table covers what matters on a low frame.
Foam or hybrid on a low bed?
| Cozey Foam Mattress | Cozey Hybrid Mattress | |
|---|---|---|
| Height | 10 inches (25 cm) | 12 inches (30.5 cm) |
| Core | 2 inches (5 cm) of transition foam over 6 inches (15 cm) of high-density foam | 2 inches (5 cm) of transition foam over 6 inches (15 cm) of pocket coils, with a foam rail and 1 inch (2.5 cm) of base foam |
| Firmness | 5.5 to 6 out of 10 | 6 to 6.5 out of 10 |
| Feel | Close and cradling, with very little bounce | More bounce, so you lie on top of the mattress |
| Getting out of bed | You settle into the bed | The coils push back, which can make it easier to roll and sit up |
| Edge | Standard foam edge | A 3 x 6 inch (7.5 x 15 cm) foam rail, so the side holds when you sit on it |
| Best for | Keeping the bed as low as possible, side and back sleepers, couples who dislike motion | Hot sleepers, combination sleepers, anyone who sits on the edge of the bed |
Both are rated for up to 250 lb (113 kg) per sleeper. The Hybrid needs fitted sheets with pockets of at least 12 inches (30.5 cm).
What should the slats and base look like?
Without a box spring, the slats have to do the supporting. Our mattresses work on a solid platform, on a slatted base, or on a solid non-flexing foundation. Wire grid and coiled box springs are not compatible. Queen and King sizes need at least one centre support beam.
What should the slats and base look like?
| What to check | What we look for | Our Ara bed |
|---|---|---|
| Slat width | At least 2 inches (5 cm) | 3 inches (7.5 cm) |
| Gap between slats | No wider than 3 inches (7.6 cm) | About 2.2 inches (5.7 cm) on Queen and King, 2.6 inches (6.7 cm) on Full |
| Slat material | Solid and not flexing | 15 mm laminated veneer lumber (LVL) on a black powder-coated steel frame |
| Load | Mattress plus sleepers within the frame limit | 600 lb (272 kg) Full, 800 lb (363 kg) Queen, 900 lb (408 kg) King, combined |
The Ara load limit counts the mattress and everyone on it together, so add the mattress weight to the sleepers before you compare. For a frame from another maker, ask for the slat width and gap before you order. Our guide to choosing a bed frame compares platform, storage and panel beds.
Do you need a box spring with a platform bed?
No. A platform bed carries the mattress on its own surface, and a box spring would only add height. On our Ara, the mattress rests directly on the supplied slats, and we do not recommend adding a box spring. Ara is also not designed for an adjustable electric base. Our guide to box springs and platform beds goes through the details, including warranty questions.
Our recommendation
Pick the mattress for the way you sleep, then check the base.
- The lowest bed: the Cozey Foam Mattress at 10 inches (25 cm).
- More bounce or a hot sleeper: the Cozey Hybrid Mattress at 12 inches (30.5 cm).
- A shared bed with a restless partner: the Foam Mattress, which absorbs the most motion.
- Sitting on the edge of the bed: the Hybrid, with its foam rail.
- Our Ara bed: use the supplied slats, with no box spring.
- Another platform bed: confirm slats at least 2 inches (5 cm) wide, gaps no wider than 3 inches (7.6 cm) and centre support in Queen and King.
You can compare both mattresses on our mattress page and pair either one with the Ara bed.
Explore our bedroom collection
Product specifications can change. Check the current dimensions on the product page before ordering.