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Bedgear M3 Mattress Review: The World’s First Modular Sleep System?

Home - store brands - Bedgear M3 Mattress Review: The World’s First Modular Sleep System?
Picture of Ben Trapskin
Ben Trapskin
I have carefully studied and evaluated many mattresses, sheets, pillows, duvet inserts, comforters, sleep gadgets, and adjustable beds for over a deca... Full Bio
BeautyRest Black Review scaled

Beautyrest Black Original Review

Simmons is practically the grandfather of the modern mattress industry. They invented the pocketed coil back in 1925, and that DNA is still very much alive in the Beautyrest Black line. At our Encinitas showroom, people often ask for a "hotel feel," and this is usually where I point them.

The Beautyrest Black is their premier luxury line. It's not just about looking fancy; it uses their T3 Pocketed Coil technology and advanced cooling foams. It’s designed to be the tank of the showroom—heavy, durable, and supportive.

Logistics: One major perk here is White Glove Delivery. This mattress is heavy (it is not a bed-in-a-box), so they set it up for you and take away the packaging. You also get a 100-night home trial, which is a page taken from the online playbook, giving you plenty of time to decide if it's right.

How Much Does It Cost?

The Black line is segmented into "Classes." Think of it like Mercedes—you have your C-Class and your S-Class. Here is the breakdown:

Model (Class) Approx. Price Range (Twin - King) Key Feature
L-Class (Entry) $1,799 - $3,799 T3 Pocketed Coil + Basic Cooling
C-Class (Mid) $2,299 - $4,299 Adds RightTemp™ Memory Foam
K-Class (Premium) $3,099 - $5,999 Adds Nano Coils + 2k Nano Coils
K-Class Ultra Plush $4,299 - $7,799 The "Kitchen Sink" of luxury

Under the Hood: Construction

This isn't just a spring mattress; it's a sophisticated hybrid. Here is what is inside the standard Original model:

  • Cover: Cool-to-the-touch fabric. It works. You feel it immediately.
  • Comfort Layers: A stack of foams including 1/2” Plush Comfort Foam, 1” Medium Comfort Foam, 1 1/2” Energy Foam, and 1/2” Beautyrest® Gel Memory Foam.
  • Tech: Micro Diamond Infused Memory Foam (diamonds conduct heat well) and SurfaceCool Plus Fiber.
  • Support System: T3 Pocketed Coil® Technology. This is a triple-stranded coil that is significantly stronger than standard coils.
  • Edge Support: BeautyEdge® foam encasement (rigid foam rails around the perimeter).
Beautyrest Black Construction Layers

My Findings

Firmness & Feel

Beautyrest lists this as a "Medium," but in my testing, it leans closer to a Medium-Firm. The T3 coil system is unforgiving in a good way—it pushes back.

Beautyrest Black Sinkage Test

The "Hybrid" Feel: It doesn't feel like a traditional spring bed that bounces you around, nor does it feel like a quicksand memory foam bed. It sits right in the middle. You sleep on it, not in it.

Edge Support: Because of the foam encasement, the edge is solid. You can tie your shoes or sleep right on the edge without rolling off. This maximizes your sleep surface.

Sleeping Positions

Side sleeping on Beautyrest Black

Despite the firmness, it contours surprisingly well for side sleeping. However, I’d primarily recommend this for Back and Stomach sleepers or heavier individuals who need that T3 coil durability. If you are a petite side sleeper, you might find this model a bit too unyielding.

Simmons Beautyrest Black vs. Sealy Posturepedic

This is the Coke vs. Pepsi of the mattress world. Here is how I distinguish them:

  • Beautyrest Black: Focuses on individual coil isolation (motion transfer control) and luxury cooling tech. It generally feels more substantial and "dead" (in a good way) regarding motion.
  • Sealy Posturepedic: Often uses a linked coil system or different hybrid designs that might have a bit more traditional bounce. They are usually more affordable but may lack the high-end "tank-like" build of the Black K-Class.

The Bottom Line: If budget allows, the Beautyrest Black T3 coil system is superior for longevity and support for heavier bodies.

The Yawnder Verdict

The Beautyrest Black Original is a beast of a mattress. It brings hotel-level luxury into the home with a support system that I trust for longevity.

  • Best For: Back sleepers, stomach sleepers, and couples who want zero motion transfer. It is also excellent for heavy people due to the T3 coils.
  • Caution For: Strictly petite side sleepers who need deep pressure relief (look at the Plush or Ultra Plush models instead).
  • Value: It is pricey, but you are paying for durable materials and white glove delivery. It’s an investment in a 10-year product.
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