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Series Three 15" Firm Mattress
172 in Mattress

Beautyrest Black - Series Three 15" Firm Mattress

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Based on 1 year's data from Mar 14, 2026 How it works

Reddit IconFuzzy-Peach948 1.0
r/Mattress20+ Year Mattress Insider: AMA
4 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 1.0
r/Mattresswhat mattress have you bought that you love.
5 months ago

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

Reddit IconRehabilitatedAsshole 1.0
r/HomeSearching for the best mattress is making me want to sleep on the floor out of frustration
4 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 1.0
r/MattressIs getting a Costco mattress worth it?
14 days 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 IconOk_Chicken_325 0.5
r/MattressQuestion about beautyrest
4 months ago

The hybrids are not the one they carry in stores. I'm curious about them. I just got the BB series three traditional. It's coming soon, and I'm nervous. As far as the coils go they are supposedly triple braided, which is made to hold up longer from what they say. With that and latex in the in the traditional, I'm surprised to hear about the sagging. Many people have good things to say, and with anything there will be some who aren't happy.

Reddit Icontriplefudge33 0.3
r/FrugalBest mattress under 1000 dollars that actually last? I'm done with fugazis/lemons
11 months ago

I second this! I’ve owned two Beautyrest mattresses in the past 13 years. The first one lasted 8 years and I’m 5 years in to the second one. I never got an extra topper (which may have given the first one more life) but it’s such a comfy bed. I go pretty firm on it too. Will buy it again when ready.

Reddit IconAmbitiousWindow6446 0.2
r/MattressTrying to find a mattress has been a horrific experience
4 months ago

Please dont get the beautyrest black series 3 - i have had it for 6 weeks and its breaking down already. 

r/MattressTrying to find a mattress has been a horrific experience
4 months ago

Im already in the process and wont touch beautyrest again. Im still in 120 night trial - but i have to pay to gave it returned.  The pillow top has mountains over 2 inches taller than the rest if mattress. 

r/MattressTrying to find a mattress has been a horrific experience
4 months ago

My mattress was 4k for a queen. It was basically their top of the line for beautyrest.. but definitely decided to go against pillow top on the one i just ordered. I decided to go with an icomfort again. 

Reddit Iconcarbonatedcoffee 0.2
r/HomeWhat’s the best mattress for a side sleeper? Have back pain with my current one
4 months ago

I picked up a Beautyrest Black series 3 and not only did my pain points disappear while sleeping, I feel more well rested than I ever have in my life. Hated the price tag, but if you view it as prioritizing your health and happiness, it easily becomes worth it.

Reddit Iconfivedice_allthrees 0.2
r/MattressInnerspring Luxury Brand recommendations? No budget.
4 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

r/MattressInnerspring Luxury Brand recommendations? No budget.
4 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 IconKitt0001 0.2
r/MattressIs a $4k mattress really that much better over a $1k one?
7 months ago

My beauty rest 3 series was a goddamn disaster. It started sinking & sagging badly after 6 months of use and I’m 119 pounds. It felt soo great initially.

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