Quick verdict
Yawnder Reviews · Original review material restored September 2026
Plank Mattress Review: Original Two-Sided Firmness Testing Restored
The Plank page had lost the first-hand detail that made the review useful: it is an intentionally extreme firm mattress with two genuinely different firmness surfaces.
Two-sided firm design
The original Plank was flippable. One side was firm and the reverse was even firmer, giving sleepers a choice between very little contouring and almost none.
What we actually felt
This was one of the firmest mattresses Yawnder had slept on. Even the 'softer' side kept the body mostly on top of the mattress rather than allowing the hips and shoulders to sink deeply.
Sinkage test
Our photos showed very little compression compared with ordinary foam mattresses. That matched the experience in bed: easy movement, minimal cradle and a flat supportive surface.
Motion transfer
Because the original version was all foam and extremely firm, motion transfer stayed low without needing a spring unit for support.
Who it suited
The old review was clear that dedicated side sleepers were unlikely to enjoy the feel. It made much more sense for people who deliberately seek a very firm surface.
Current-shopping note
Brooklyn Bedding now sells several Plank variants, including hybrid/natural versions. Confirm which Plank you are considering because the original all-foam review does not describe every current model.
See current Plank Mattress options →
Affiliate link: Yawnder may earn a commission at no additional cost to you. Confirm the current model and availability with Plank Mattress.
Yawnder Reviews · Disclosure:Some links may be affiliate links. Current specifications and policies can change.
Standardized test data
Every mattress in the current program follows the same rubric and order, combining instrument-measured categories with hands-on evaluations so scores are comparable across brands.
| Measurement | Result | How to read it |
|---|---|---|
| Firmness | 9 | 1–10 scale (6.5 = medium-firm) |
| Construction | Foam | Foam / hybrid / latex / airbed |
| Profile height (manufacturer spec) | 10" | inches — as advertised by the brand |
| Profile height (Yawnder measured) | Not measured | inches — measured on our own sample |
| Motion transfer | 8.7 | score /10 — higher is less disturbance |
| Edge support | 8.3 | score /10 — sitting and sleeping edge |
| Temperature | 9.2 | score /10 — higher sleeps cooler |
| Pressure relief | 7.8 | score /10 — shoulder and hip |
| Spine alignment | 9.2 | score /10 — neutral posture |
| Ease of movement | 9.2 | score /10 — repositioning speed |
| Expected durability | 8.7 | score /10 — projected 5-year hold |
| Off-gassing | 8 | score /10 — higher is less smell |
| Queen price | $1,099 | MSRP before seasonal discounts |
| Manufacturer sleep trial | 120 nights | when bought direct from the brand |
| Manufacturer warranty | Limited Lifetime | as published by the manufacturer; applies wherever you buy |
| Last test date | August 26, 2026 | date of our most recent standardized test session |
How this score is built
Support and spine alignment 25% · pressure relief 20% · temperature 15% · motion transfer 15% · edge support 10% · durability 10% · value 5%. Scores come from standardized instrument measurements and structured hands-on evaluations using the same Yawnder testing rubric. Read the full rubric.
Find a better mattress for you
Use Yawnder's standardized test data to compare this mattress with other models, or answer a few questions and narrow the field by sleep position, feel and priorities.
Compare before you buy
Compare this mattress against 142 tested mattresses
Sort all 142 mattresses we have tested by pressure relief, support, cooling, motion isolation, edge support, price, trial and warranty, then filter by how you actually sleep. Of those, 86 hold a complete standardized record and 46 a partial standardized record.