Beautyrest Black

Series Three 15" Firm Mattress

Beautyrest Black Series Three 15" Firm Mattress

Running these analyses costs money. Buy through my links to help keep lights on! I may get a small commission.

Overall

#167 in

Mattress

according to Reddit Icon Reddit

Sentiment score71% positive
10
1
3
Last updated: May 13, 2026

Reddit Reviews

Reddit Iconfivedice_allthrees
3 months ago

I’ve tried a few and now I have the beautyrest black series 3 firm and I really like it. It’s not too firm at all with all the latex and memory foam. I almost feel like I could have gone extra firm

3 months ago

Not yet but I’ve only had it since October

6 months ago

I ended up with a beautyrest black series 3 after saatva classic, saatva contour 5, and Leesa chill. I think I am gonna keep it

6 months ago

I found the Leesa chill to be not supportive enough and my boyfriend and I were sinking to the middle and waking up with hurt backs. I got the beautyrest black series 3 in firm because I really didn’t want anything like that to keep happening and I think it’s a good combo of firm support but luxury and soft top. But it’s made well too so maybe the medium wouldn’t be too bad if you like it softer.

Reddit IconFuzzy-Peach948
6 months ago

I bought the beautyrest series 3 firm and love it so much! I tried the avocado as well at their store and found it much softer in comparisson. The BR black series 3 also uses 1.5" latex, foam and  has the pocketed coils they are known for. I would go with BR over avocado. 

6 months ago

I bought the beautyrest series 3 firm and love it so much! I tried the avocado as well at their store and found it much softer in comparisson. The BR black series 3 also uses 1.5" latex, foam and  has the pocketed coils they are known for. I would go with BR over avocado. 

Reddit IconOdd_Arachnid_3981
7 months ago

We bought a BRB series 3 firm recently and like it!

3 months ago

We also have the BRB series 3 firm since August and love it! It’s broken in very nicely.

3 months ago

We love our Beautyrest Black Series 3! Purchased a firm in August and it’s broken in nicely. I bet the medium or firm would feel comfy! Definitely lay on it if you can.

Reddit IconRehabilitatedAsshole
6 months ago

If money's not an issue, the Beautyrest Black has been fantastic for my back, but you should try them out in the store. https://www.mattressfirm.com/black-series-three-15-firm-mattress/5637497862.p?variantid=5637498768

Reddit IconSupportSuccessful525
2 months ago

We just got an outlet beautyrest black series 3 firm for $1800. So we did pay $800 more, but it’s a 4.5k mattress and we can already tell the difference. Good luck!

Reddit IconLuLuLuv444
6 months ago

I bought the black series 3 medium firm, and they're horrible and they sleep extremely hot just like any other memory foam. There's no such thing as cooling technology in memory foam no matter how much they want to spin it - that there is cooling technology. I will sleep with the windows open with a box fan in the window pointing directly at me when it's in the low 40s, and I'm still waking up hot. So I would question if you know what you're talking about. Once you break it in, it lacks support and you have to sleep all over the mattress to properly break in. If you move around in your sleep, memory foam is not for you as it creates imprints, so will feel uneven.

6 months ago

Are you getting a queen or a king because it should only be three grand of queen. Personally I just bought one over a month ago and it takes a lot to break it in. You will absolutely hate it in the beginning. If you sleep hot, also do not recommend getting it. If I could go back I would go back to a traditional mattress.. It'll be super firm until you break it in and you'll have to sleep all over the mattress to break it in properly

about 2 months ago

I advise against the black beauty rest series 3. Got it and eventually leaves an impression in a short period of time. Can even see it just looking at it

about 2 months ago

It's outlet so can't return it. It has to sag one and a half inches to warranty it. We're not there yet. . impression in a matter of a couple months and lacking back support for the small of the back. It also sleeps incredibly hot. If you actually read some reviews including mattress sales people, they'll tell you that they get returned frequently and they don't have good reviews for exactly what I'm stating. It's the series 3. It's not that old one that had major sag issues. That was 2

Reddit Iconking8654
16 days ago

our ten year old beautyrest black international firm has served us well, but lately has been starting to sleep more as a soft/medium. as a stomach sleeper and wife side sleeper, we went with ezsleep talalay/dunlop/dunlop with split sides/firmness layers for our king, comes in tomorrow. personally love latex pillows, figured i’d try this out could check out underground mattress forums as well for best vendors and knowledgeable people

Reddit IconDavidinthe6ix
6 months ago

I have been sleeping on a firm (originally) foam mattress for 17 years and have just bought a CA$1300 (King) Beautyrest spring mattress. Black Friday price, >50% off but always 40% otherwise… Seemed very good in store. What’s your feeling on inner spring vs foam?

Rankings by Use Case

Top recommendations from others in the same boat

Best for Ease of movement & sex

Novaform - Platinum 16.5" Luxury Hybrid Mattress

Top pick

Novaform - Platinum 16.5" Luxury Hybrid Mattress

Individuals who toss and turn frequently, or couples who prioritize a mattress that is responsive and bouncy for sexual activity, and dislike the "sinking" feeling of memory foam.
See rankings →

Best for Heavy & plus-size sleepers

Big Fig - Classic Mattress

Top pick

Big Fig - Classic Mattress

Individuals with higher body weights (typically 230 lbs or more) who find that standard mattresses quickly sag, lose support, and cause back or joint pain.
See rankings →

Best for Hot sleepers

Purple - The Purple Mattress

Top pick

Purple - The Purple Mattress

Individuals who consistently wake up feeling hot or sweaty, and find that their mattress absorbs and retains body heat throughout the night.
See rankings →

Best for Long-term durability

SleepOnLatex - Pure Green Organic Latex Mattress

Top pick

SleepOnLatex - Pure Green Organic Latex Mattress

Buyers who view a mattress as a long-term investment and want to purchase one that will maintain its support and comfort for over a decade, prioritizing total cost of ownership over a low initial price.
See rankings →

Best for Motion isolation for couples

Helix - Midnight Luxe

Top pick

Helix - Midnight Luxe

Couples or co-sleepers who are easily woken up by a partner's tossing, turning, or getting in and out of bed.
See rankings →

Best for Natural & organic materials

SleepOnLatex - Pure Green Organic Latex Mattress

Top pick

SleepOnLatex - Pure Green Organic Latex Mattress

Health-conscious individuals or those with chemical sensitivities who want to avoid synthetic foams, chemical off-gassing, and potentially hazardous materials like fiberglass in their sleep environment.
See rankings →

Other Reddit Recommendations: