Plank Firm Luxe  Mattress Review

This hybrid mattress is 34.9 cm (13.7") tall, so you can use standard fitted sheets.

The Plank Firm Luxe is a Firm mattress with one 'Firm' side and one 'Extra Firm' side. The 'Firm' side is supportive enough for lighter and average-weight back and stomach sleepers. It's also decently supportive for heavier people, making it a good option for back sleeping and side sleeping for people in that weight category.

You can see the results for the other side of the mattress in our review of the Plank Extra Firm Luxe.

It's not a very conforming mattress for most people. If you're in the lighter weight category, it has poor conformity and will put a lot of pressure on your shoulder if you're a side sleeper. Its performance is better for average-weight people, but still mediocre, and it's not ideal for side sleepers in that weight category either. It offers good body conformity for heavier people, who will sink a little into the comfort layer. It's a reasonable option for side sleepers in that weight category, especially if you're looking for a more supportive mattress.

This mattress is quite supportive for most people. It's most supportive for people in the lighter weight category, offering impressive support, which makes it a good option for stomach and back sleeping. It also offers good support for average-weight people and decent support for heavier people, so it's supportive enough for back/stomach sleepers in those weight categories as well. However, if you're a heavier stomach sleeper, you might want a mattress that offers better support for proper spinal alignment, such as the Sleep On Latex Pure Green Organic.

This mattress has a very bouncy feel. Your movements feel supported, so it's easy to move around on, and you won't feel stuck in place.

The comfort layers aren't very enveloping. As you might expect for a Firm mattress, you won't sink into it much overall, and it will feel like you're sleeping 'on' your mattress and not 'in' it. The sleeping surface is very contouring, so it molds around you, which helps with pressure relief.

It's an extremely responsive mattress. The sleeping surface bounces back quickly after you move, so you won't feel hugged or stuck in place.

It offers excellent motion isolation. You won't feel most smaller movements, like a pet jumping onto the foot of the bed. Larger movements, like your partner rolling over, are only felt near the source. Motion dissipates faster on some mattresses, but still, it's a great option if you sleep with a partner.

It has fantastic edge support. The edges are reinforced with pocket coils and are difficult to compress, so you won't sink much when you sit or sleep on the side of the mattress. They compress very evenly as well, so when you sit on the side of the bed, they don't form a very steep ramp. This increases the comfortable sleeping surface and gives you a solid surface for getting in and out of bed.

It has good cooling. It feels decently cool when you first get into bed and dissipates heat a bit more efficiently overnight. It's not ideal for hot sleepers, especially if you usually feel overheated as you're falling asleep, but it's cooling enough to keep most people comfortable.

The manufacturer doesn't disclose what material the cover is made of. This mattress has the standard cover, but the Plank Firm Luxe is also available with GlacioTex Cooling Cover, which would be sewn onto the other, 'Extra Firm,' side of the mattress.

The edges are reinforced with pocket coils, which help provide its outstanding edge support.

The quilted top includes a layer of fiberfill and two identical layers of medium-soft polyfoam. The upper comfort layer is also polyfoam. It has a much firmer feel but also has some characteristics more typical of memory foam, like high density and lower resilience. This helps give the 'Firm' side of the mattress a highly contouring feel. The transition layer below is made of more resilient polyfoam and helps add support and distribute your weight over the spring layer.

This mattress contains mostly good-quality foam, including the transition layer and upper comfort layer. The comfort layer in particular is dense enough to be considered high-quality polyfoam. The polyfoam in the quilted layer is of lower quality, however, and may start to form permanent indentations sooner.

The quilted layer is about 5.0 cm (2.0") and includes 1.4 cm of fiberfill between 1.8 cm layers of polyfoam. This is the mattress's only 'soft' layer, and most people won't sink past it.

The 2.5 cm (1.0") polyfoam comfort layer is much firmer, which helps explain the mattress's weaker pressure relief performance for light and average-weight people, since you'll feel like you're hitting a solid surface under the quilted top. The layer is followed by a 5.0 cm (2.0") transition layer, which is also very firm and helps distribute your weight over the springs.

Pocket coils make up the support layer, which is in the middle of the mattress because of its double-sided design. The individually wrapped design of the springs helps improve motion isolation, and the thicker 13-gauge coils help give the layer its very firm feel.

The quilted layer has medium firmness, so you'll sink into it quite easily, and it helps add pressure relief. You'll likely compress it fully and also feel the firm upper comfort layer below. The transition layer is much firmer, which prevents you from sinking in very much, and helps distribute your weight over the springs.

The pocket coil layer adds support, whether you're using the 'Firm' or 'Extra Firm' side of the mattress. It's very stiff, which helps support the heavier parts of your body, like your hips.

The foam in the quilted top is very resilient, so it has a springy feel that contributes to the mattress's responsive feel. The comfort layer polyfoam is much less bouncy, similar to some memory foams, like the Winkbeds Plus's comfort layer. This may help add some contouring. The very firm transition layer is also very resilient, so it seems to 'push back' against your movements.

The springs are bouncy, and combined with the springy foam layers, they give the mattress a very bouncy feel. This makes it feel easier to move around on, as it pushes back against your movements.