I Slept on the Plank Mattress So You Don’t Have To—My Full Review

Published August 4, 2025 | By admin

Shopping for a mattress isn’t what it used to be. With dozens of online brands promising the “perfect night’s sleep,” it’s easy to fall into a black hole of flashy ads and five-star reviews. One that kept popping up in my search? The Plank Mattress by Brooklyn Bedding is famous for being one of the firmest mattresses ever made. Some say it’s heaven for back sleepers. Others call it a glorified plank of wood. I decided to put it to the test. Here’s what really happened after sleeping on it for 30 nights.

What Makes the Plank Mattress So Different From Other Beds?

If you’ve been mattress shopping lately, you’ve likely seen the usual suspects—soft memory foam, hybrid mattresses, and plush pillow tops. The Plank Mattress by Brooklyn Bedding dares to be different. While many brands aim to hit the middle of the road in firmness to appeal to the broadest market, the Plank is proudly, boldly ultra-firm. It’s designed for sleepers who prioritize support above all else and are willing to sacrifice some softness for optimal spinal alignment.

A Flippable Firmness Design

One of the standout features of the Plank Mattress is its dual-sided construction. Unlike traditional one-sided beds, the Plank gives you two sleep surfaces in one product:

Side	Description	Firmness Scale (1–10)
Firm	Slight cushion but still very supportive	7.5–8
Ultra-Firm	Flat, dense surface with minimal give	9–9.5

This flippable design gives buyers more control and flexibility, allowing them to experiment with firmness levels without committing to a single-sided mattress.

Built With High-Density Support Foam

The mattress features layers of high-density polyfoam, which offer minimal sinkage and maximum lift. There’s no “hug” like you’d get with memory foam. Instead, it promotes a level and neutral sleeping posture, especially beneficial for those with lower back pain or posture issues.

Additional highlights include:

A quilted top layer for mild pressure relief
Optional Plank Luxe Hybrid version with coils for bounce and breathability
CertiPUR-US® certified foams for safety and low VOC emissions

Cooling and Temperature Regulation

Contrary to expectations, the Plank doesn’t sleep hot. While it’s not infused with advanced cooling gels like some luxury models, the mattress stays relatively temperature-neutral due to its firm construction. There’s less foam wrapping around your body, which means less heat retention.

Key takeaway: The Plank Mattress is engineered for firmness lovers and back-pain sufferers, with a flippable two-in-one design, dense support foam, and a commitment to proper alignment over plushness.

My First Night (and Week) Sleeping on the Plank—The Real Feel

Sleeping on the Plank Mattress was a wake-up call—literally. On the first night, I could feel every inch of my body being supported rather than cradled. There was no sink-in sensation, no “nesting” feeling that you get with memory foam. It was flat, firm, and honestly uncomfortable at first. But over the next several nights, something surprising happened—my body started to adapt.

Night One: Like Sleeping on the Floor

Initially, I tried the ultra-firm side, which felt jarring. It was like placing a thin blanket on a hard floor. My shoulders and hips, as a combo sleeper, felt sore by morning. But I did wake up with better posture—my spine felt elongated, and I stood taller throughout the day.

Nights 2–4: Breaking Through the Firmness

By the third night, I noticed reduced lower back stiffness. My body wasn’t sinking or arching unnaturally. I began waking up fewer times during the night. My brain still protested the lack of cushioning, but my muscles thanked me.

Nights 5–7: Switching to the Firm Side

The ultra-firm side proved too much for long-term comfort, so I flipped to the “firm” side. This gave a bit more give, while still preserving all the support. It made a huge difference in how quickly I fell asleep and how refreshed I felt in the morning.

Week-Long Impact

Sleep Quality: Improved steadily after night 3
Pain Relief: Less pressure on my lower back
Sleep Positioning: Stayed in place better, no sagging
Mental Shift: Went from dreading bedtime to looking forward to rest

Key takeaway: The first night on the Plank may feel brutal, but your body can adapt within days, and the payoff is deeper sleep and better alignment.

Who Is the Plank Mattress Actually For? (And Who Should Avoid It)

Not all mattresses are created equal, and they shouldn’t be. While many are built to please the masses with medium firmness and cushiony tops, the Plank mattress makes no apologies for being designed for a very specific type of sleeper. To determine if it’s right for you, it’s essential to understand the type of body and sleep style this bed supports best.

Ideal For:

Back Sleepers

Back sleepers benefit the most from the Plank’s ultra-firm surface. It keeps the spine aligned and prevents the lower back from sinking in.

Stomach Sleepers

This group often struggles with sagging hips on softer mattresses. The Plank helps by offering a completely flat surface that keeps the pelvis from dipping.

Heavier Individuals (250+ lbs)

Those with larger frames often find that standard mattresses compress too easily. The Plank offers a stable surface that holds up over time.

People with Chronic Back Pain

Doctors and chiropractors often recommend firm mattresses for spinal alignment. The Plank promotes neutral posture, which can reduce pain.

Not a Good Fit For:

Side Sleepers

If you sleep primarily on your side, the lack of pressure relief on the shoulders and hips can be uncomfortable, possibly leading to numbness.

Lightweight Sleepers (<130 lbs)

Lighter individuals may find the mattress too hard, as they don’t apply enough pressure to activate the slight cushioning available.

Couples with Different Preferences

Since the entire surface has the same feel, there’s no way to customize firmness for each person.

Soft-Mattress Lovers

If you love the sensation of being hugged or “sinking in” at night, this mattress may feel more like punishment than comfort.

Key takeaway: The Plank is tailor-made for back and stomach sleepers, especially those with back pain or heavier frames, but side sleepers and cushion-seekers should steer clear.

Plank Mattress Pros and Cons After 30 Days

After 30 full nights of sleep on the Plank Mattress, I had a thorough understanding of what it offers—and what it lacks. While the firmness and support never wavered, the experience definitely won’t be for everyone. Here’s how it measured up over time.

What Worked Well

Unmatched Support

My back never felt better. I woke up straighter, with less soreness and fewer morning stretches required.

No Motion Transfer

I could shift or get out of bed without disturbing my partner—great for couples, despite its firmness.

Reversible Design

Having two firmness levels in one mattress added value. I appreciated being able to experiment without buying a topper or a new mattress.

Stays Cool

I was concerned about heat retention, but the firm surface meant less contact with foam and better airflow around my body.

What Fell Short

Too Firm for Some

No matter how supportive it was, I missed a bit of softness, especially when sleeping on my side.

$99 Return Fee

Returns are allowed within 120 nights, but you’re charged a shipping fee.

No Edge Support

Sitting or sleeping near the edge felt a bit unstable, which was a surprise for such a dense mattress.

Break-in Period is Real

It took almost a week for my body to get used to the feel.

30-Day Verdict Table

Feature	My Rating (1–5)
Support	★★★★★
Comfort	★★★☆☆
Ease of Setup	★★★★★
Heat Regulation	★★★★☆
Long-Term Comfort	★★★★☆

Key takeaway: The Plank offers exceptional support and durability, but it comes with trade-offs in softness and ease of return—ensure your sleep style aligns with the firmness profile.

Is the Plank Mattress Worth It? My Verdict and Buying Advice

After a month of sleeping on the Plank, I can say this: it’s not for everyone, but it was absolutely worth it for me. The dramatic improvement in my lower back pain and sleep consistency was enough to outweigh the mattress’s harsh introduction. That said, you need to go into this knowing what you’re signing up for.

When It’s Worth the Investment

You sleep on your back or stomach and need better spinal support
You’re tired of your current mattress sagging or losing shape
You suffer from lower back pain or discomfort from overly soft surfaces
You want a mattress that lasts longer and keeps its structure

When to Think Twice

You’re a side sleeper needing plushness
You have joint pain in your hips or shoulders
You love the “hug” of traditional foam or hybrid mattresses
You want a generous return policy with no fees

Tips Before You Buy

Test both sides: Don’t stick with ultra-firm if it feels too hard—flip it.
Add a mattress topper if you want to soften the feel slightly.
Give it time: 7–10 nights minimum before making a final judgment.
Set realistic expectations: This mattress is support-first, not luxury-soft.

Key takeaway: The Plank is a worthy buy for the right sleeper—those craving durability, support, and alignment—but not for anyone chasing cloud-like comfort.

FAQs

Is the Plank mattress really that firm?

Yes. It’s one of the firmest mattresses available. The ultra-firm side is especially rigid.

Can it help with back pain?

For many back sleepers, yes. The firm support encourages a neutral spine and can ease discomfort.

Is the mattress flippable?

Yes. One side is firm, the other is ultra-firm. You can test both.

Does it sleep hot?

No. It stays fairly cool because the firm foam doesn’t trap heat like traditional memory foam.

What if I don’t like it?

You can return it during the 120-night trial, but Brooklyn Bedding charges a $99 return fee.

Conclusion

Sleeping on the Plank mattress was not love at first night, but it grew on me. For those who crave a truly firm sleep surface and are sick of soft foam beds, it offers outstanding support and minimal fluff. It’s not a mattress for everyone, but for the right person, it might be the firm foundation you’ve been looking for.