Firmest All-Foam
Plank Firm
Flippable · Dual-Firmness
from $561
- Two firmness levels — firm and extra-firm, one flip away
- High-density support foam for true back & stomach support
- Optional GlacioTex™ cooling cover
Designed & Assembled in Arizona
The Firmest
Mattress Made
A truly firm, flippable mattress engineered for back and stomach sleepers who want real support — built in our own factory, not outsourced.
- Low Price Guarantee
- White Glove Delivery & Setup Available
- A+ BBB Rated
- 5 Texas & LA Showrooms
The Lineup
Find Your Plank
The firmest all-foam mattress, or the firmest hybrid — both flippable, both built in our Arizona factory. Shop all Plank →
Firmest Hybrid
Plank Firm Luxe
Flippable Hybrid · Coil Support
from $799
- Individually encased Ascension® firm coils
- Flippable firm & extra-firm with added contouring
- Optional GlacioTex™ cooling cover
We Own the Factory
Built by Us, Not Outsourced
Plank is made by Brooklyn Bedding in our own Arizona factory — so we control every layer, every stitch, and every price. That’s how we deliver a genuinely firm mattress at a price that makes sense.
American-MadeFlippable DesignTrue Firm Support
Inside Every Plank
Layered for Real Firmness
Every Plank is a stack of purpose-built layers — a quilted top, high-density support foam, and (on the Luxe) individually encased firm coils — tuned to hold you flat and supported, night after night.
Flip it over for an even firmer feel. One mattress, two firmness levels, zero compromise.
Why Plank
Firm, Done Right
Flippable
Two firmness levels in one mattress — firm on one side, extra-firm on the other. Just flip to change the feel.
Real Support
Engineered for back and stomach sleepers who need a genuinely firm surface that keeps the spine aligned.
Factory-Direct Value
Because we own the factory, you get a premium firm mattress without the markup — built in Arizona, backed by Sleep City.
One Flip from Firm to Extra-Firm
Dial in exactly the support you want. No returns, no second mattress — just flip it over.
Feel Plank in Person
Try the firmest mattress made at a Sleep City showroom, or order online with white-glove delivery. Our sleep experts help you pick the right firmness.