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The Plank Firm is a dual-sided all-foam mattress with an extra firm feel that delivers superior support to front and back sleepers. It has returned to the lowest price we've seen it at this Memorial Day, with 30% off the Plank Firm mattress at Plank. That means a queen is now $932.40 (was $1,332.)
When I tested the Plank Firm Mattress, I was skeptical. It doesn't have the 'cozy' feel I'd always associated with comfort and it was hard at first to appreciate anything but the firmness.
But after a few minutes of lying quietly, I could feel what made the Plank Firm mattress stand out: support. The Plank Firm has exceptional support that can compete with the best mattresses we've tested, beating even some premium models — all at a mid-range price.
It's not a feel everyone will love — I recommend the Helix Dawn if you want firm, but not that firm — but with 30% off, here's why it's one of my top picks of the Memorial Day mattress sales 2025. If you are looking for an excellent price on a top rated mattress but not sold on the Plank, we're also tracking the latest deals as they happen in our Memorial Day mattress sales live blog.
Too firm for your tastes? Try this...
The thing about the Plank Firm being an Extra Firm mattress is, and excuse me for stating the obvious, that it's a hard mattress. That means it won't appeal to everyone and even firm mattress fans might prefer something with a little more of that 'cozy' feeling. For you, I recommend the Helix Dawn Mattress...
More top mattress sales to consider
- Saatva: Get $400 off our top-rated bed
- DreamCloud: our top rival to Saatva from $399
- Helix Sleep: 27% off with code TOMS27
- Leesa: 30% off mattresses + free bedding
- Casper: up to 35% off cooling mattresses
- Avocado: 10% off organic mattresses
- Emma: 60% off all mattresses
- Tempur-Pedic: up to $500 off + $300 free accessories on selected adjustable mattress sets
- Purple: up to $400 off mattresses + free pillows
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