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Lull Mattress Review

The Lull is an all-foam, mattress-in-a-box from Lull. It combines a memory foam comfort layer with firmer poly foams to create a balance of pressure relief and support. Is this the online mattress you’ve been dreaming of?

The Lull is currently the only mattress from the Lull brand, so I was excited to take this mattress for a test run. And I’m even more excited to share what I’ve discovered with you here!

Ready to learn all about the Lull? Then read on for my comprehensive review! Or jump to my review summary if you’re short on time.

$250 Off!
Lull Mattress
Lull Mattress
Lull Mattress

A top layer of gel infused memory foam helps the Lull mattress stay cool and breathable — a good pick for hot sleepers. 

Brand Summary

The Lull mattress is created by Lull, an online mattress and bedding company. The brand is committed to producing a quality mattress at a value price and delivering exceptional customer service. In addition to its mattress, Lull also sells bed frames, a mattress foundation, a pillow, and a variety of bedding products including sheets and a mattress protector.

As an online mattress, the Lull faces some fierce competition. Later in this review, we’ll pit the Lull against two of its biggest competitors: the Purple and the Nectar. Before we do that, let’s get up close and personal with the Lull!

Lull Mattress
The Lull mattress in the Sleepopolis bedroom

What Is the Lull Made Of?

The Lull is an all-foam bed that uses a combination of memory and poly foams to create a balanced feel. But these aren’t your everyday foams. The memory foam is infused with gel to help dissipate heat, and all of the foams are CertiPUR-US Certified, meaning they’re free of a variety of harmful chemicals.

Intrigued? Let’s take a gander at what’s inside the Lull!

Cover – First up, you’ll find a cover made from a polyester blend that has a durable, cozy feel.

Comfort Layer – Beneath the cover, there’s a comfort layer made from 1.5” of gel-infused memory foam. In classic memory foam fashion, this layer has a slow response to pressure, allowing sleepers to sink in for some body-contouring and pressure relief. Meanwhile, the gel infusion helps draw heat away from the sleeper.

Transition Layer – Next up is another 1.5” foam layer, but this time it’s made of poly foam. It’s a little firmer and has a quicker response to pressure than the memory foam above it. This layer helps balance out the softness of the memory foam, creating a mix of support and comfort that could appeal to back and side sleepers.

Base Layer – Finally, you’ll find 7” of high-density poly foam. This material is firmer than all the layers above, and it helps provide support and structure for the mattress.

Lull Mattress Materials
The materials used in the Lull mattress

How Firm Is the Lull Mattress?

Now that we know what’s inside the Lull, we can understand how it feels to sleep upon it! Let’s get things started by taking a look at this bed’s firmness.

As we consider the Lull’s feel, keep in mind that firmness is somewhat subjective. Your body weight, shape, size and personal preferences will impact how firm a mattress feels to you – and the same goes for me! So know that my assessment isn’t necessarily the be-all and end-all here.

Lull Mattress Firmness
I found the Lull mattress to have a medium firmness

Based on my personal experience on the Lull, I ranked it around a 6 out of 10 on the firmness scale. The industry standard for medium firmness is 6.5, so the mattress is just a touch softer than medium firm.

Understanding the Lull’s construction helps us make sense of why it feels a hair softer than medium firm. The mattress combines soft memory foam with firmer poly foams, which creates a balanced feel that’s right around the middle of the firmness scale. This could appeal to back and side sleepers, because both sleep positions require a bit of pressure relief combined with support for spinal alignment.

$250 Off!
Lull Mattress
Lull Mattress
Lull Mattress

A top layer of gel infused memory foam helps the Lull mattress stay cool and breathable — a good pick for hot sleepers. 

Testing the Lull Mattress

A mattress’s firmness rating offers valuable insights, but it doesn’t show the whole picture. To determine whether a bed is really a good match for you, it’s also critical to consider Pressure Relief and Motion Transfer. So let’s do that now!

Pressure Relief

For those in need of a primer, the term “pressure relief” refers to a bed’s ability to alleviate tension at sensitive areas including the hips, lower back, and shoulders. It helps you know whether a mattress will ease pressure on various body parts so you can sleep comfortably in your preferred position. Memory foam is one of the best materials for pressure relief and if you’re interested in learning more you can read our best memory foam mattress article.

To test the Pressure Relief on the Lull, I used a helpful tool called a pressure map. I position this device on top of the mattress, hop on top, and let the map track my body’s force as I lie in different positions. Low-pressure areas are highlighted in blue, and the highest pressure areas show up as red.

Lull Mattress Pressure
Pressure map test results for the Lull mattress

Back – When I’m on my back, my weight feels evenly distributed. I sink into the comfort layer a bit and feel some nice contouring around my body. At the same time, the firmer poly foam layers keep my hips elevated and aligned with my spine. They also keep my whole body elevated enough that I don’t feel stuck in the bed. This could be a good choice for back sleepers who like a mattress with a gentle feel.

Side – It’s easy to switch positions from my back to my side, and once I land there, I’m impressed with the pressure map results. I don’t feel pressure building up at the shoulder or hip (common hot spots for side sleepers). I think this could be a good option for side sleepers or combo sleepers who switch between their side and back.

Stomach – When I move to my stomach, I don’t feel any pressure points. But I’m also not feeling enough support. My hips sink too far into the mattress, which is throwing my lower spine out of alignment. Strict stomach sleepers will probably want to look for a bed with firmer support.

Lull Mattress Back Sleeping
Lying back on the Lull mattress

Motion Transfer

As with Pressure Relief, Motion Transfer impacts whether a mattress matches your sleep needs. This term refers to whether you’ll feel a sleeping partner’s movements if they shift around during the night. It’s extra important to consider motion transfer if you share a bed with a partner, child, or pet!

To test motion transfer on the Lull, I dropped a 10 lb. steel ball from 4 inches, 8 inches, and 12 inches. These heights mimic various movements, from tossing and turning to getting out of bed or jumping on top of it. Next, I measured the disturbance caused by each of these drops. The bigger the lines, the bigger the disturbance!

Lull Mattress Motion Transfer
I was impressed with the Lull mattresses ability to isolate disturbance

Memory foam tends to perform well with motion transfer, because its slow response to pressure helps absorb movement. The Lull has a layer of memory foam, but it also has firmer poly foams beneath that — so I was curious to see how it would perform on my motion transfer test. Overall, I’d say the bed performed about average. It did a decent job of isolating smaller movements, but you’re still going to be disturbed if a dog or kid jumps into bed during the night.

$250 Off!
Lull Mattress
Lull Mattress
Lull Mattress

A top layer of gel infused memory foam helps the Lull mattress stay cool and breathable — a good pick for hot sleepers. 

Lull vs

If you’re looking at the Lull, then you might also be considering other popular online mattresses. So let’s compare the Lull to some of its mattress-in-a-box competitors here!


  • While the Lull is an all-foam mattress, the Purple uses a proprietary hyper-elastic polymer in its comfort layer. You won’t find this unique material in any other mattress.
  • The Purple’s hyper-elastic polymer creates a medium firm feel and balances support with pressure relief, much like the Lull. The hyper-elastic polymer is bouncier than the Lull’s foams, so you’ll enjoy more springness and mobility on the Purple.
  • While the Lull uses gel to dissipate heat, the Purple’s temperature-neutral polymer does an even better job of sleeping cool. It could be the better choice for folks who are prone to overheating.
  • Like the Lull, the Purple is probably best suited to back and side sleepers thanks to its balance of support and comfort.
    The Purple is more expensive than the Lull.

Has the Purple piqued your interest? Learn more about this mattress in our detailed review!


  • Like the Lull, the Nectar is an all-foam bed that uses memory foam for comfort.
  • While the Lull has 1.5” of memory foam, the Nectar has nearly 5” of this material. There’s more room to sink into the Nectar, and it’s maybe a touch softer than the Lull.
  • Thanks to its thick memory foam layers, the Nectar could be an especially good match for side sleepers, who need plenty of pressure relief around the shoulder and hip.
  • Memory foam lovers might really appreciate the Nectar, because it uses a ton of this material. It offers classic memory foam characteristics such as body contouring, sinkage, and pressure relief.
  • The Nectar and Lull are fairly comparable when it comes to price.

Need to know more about the Nectar? Check out our full review!

Curious to know how the Purple and Nectar stack up? Check out our full Nectar vs Purple comparison.

Is the Lull Mattress Right for You?

Wowza, you’ve nearly made it through this whole review! Only one question remains: Is the Lull the right mattress for you? I can’t answer that for you, but I can share an overview of my pros and cons for this mattress!

$250 Off!
Lull Mattress
Lull Mattress
Lull Mattress

A top layer of gel infused memory foam helps the Lull mattress stay cool and breathable — a good pick for hot sleepers. 


  • Back sleepers might really like this mattress, because it offers a mix of pressure relief and spinal support. The memory foam comfort layer provides some body contouring, while the firmer poly foam layers help elevate the hips in line with the spine.
  • This could also be a great choice for side sleepers, because the memory foam comfort layer provides pressure relief around the shoulder and hip. At the same time, the firmer poly foam layers help maintain side sleeping spinal alignment.
  • Folks who love memory foam will find many of the material’s characteristics at play in this bed: It offers some body-contouring, sinkage, and pressure relief.


  • Stomach sleepers might not get enough support on this mattress. It’s likely that your hips will sink into the bed, throwing the spine out of alignment. Strict stomach sleepers will probably want to look for something firmer.
  • Heavier folks (say, 250 pounds and up) also might not find enough support on the Lull, because its all-foam construction isn’t exceptionally sturdy. It also doesn’t have great edge support, so larger folks won’t be able to utilize the full surface of the mattress.
Lull Mattress Side Sleeping
I like the Lull for side sleepers


  • Trial: 365 Nights
  • Shipping & Returns: Free
  • Warranty: Lifetime

How Much Does the Lull Cost?

$250 Off!
Lull Mattress
Lull Mattress
Lull Mattress

A top layer of gel infused memory foam helps the Lull mattress stay cool and breathable — a good pick for hot sleepers. 

Twin38" x 75" x 10"48 lbs$749
Twin XL38" x 80" x 10"52 lbs$849
Full54" x 75" x 10"66 lbs$949
Queen60" x 80" x 10"77 lbs$1,049
King76" x 80" x 10"96 lbs$1,349
California King72" x 84" x 10"94 lbs$1,349


Do you need a box spring with the Lull?

No. The Lull, like many mattress-in-a-box beds, is designed to work on a slatted bed frame and doesn’t require a box spring. That said, if you already have a box spring or you prefer to use one, feel free to do so.

Are Lull mattresses toxic?

No. The foams in the Lull mattress are CertiPUR-US certified, which means they’re free of a variety of harmful chemicals, including formaldehyde, heavy metals, and ozone depleters. These foams also minimize off-gassing.

Can you flip a Lull mattress?

No, you should not flip a Lull mattress. The support layer is on the bottom, so if you did flip it, you’d be sleeping on a super-firm surface. If you’re worried about wear, aim to rotate your mattress 180 degrees approximately every six months.

Lull Mattress
  • Materials
  • Comfort
  • Support
  • Value
  • Cooling
  • Edge Support
  • Trial
  • Warranty


Lull features a 10-inch, all-foam design with a memory foam comfort layer. Our testers all rated the Lull as having a medium firmness when it comes to feel. We also thought the Lull did a good job at preventing sleepers from overheating, which some memory foam mattresses can be prone to.

Logan Block
Logan is the content director of Sleepopolis, which means he not only reviews new mattresses every week, but also curates all the comparisons, best of pages, and video guides on the site. He takes a straightforward, honest approach to his reviews and endeavors to give viewers an objective look at each new product he tries out. Logan has perfected his method by personally testing over 200 different mattresses, so he’s not only able to discern the overall vibe of a specific bed, but to contextualize its feel within the bed-in-a-box market as a whole. When he’s not hopping on a new bed or working with our editorial team to whip up an engaging sleep education guide, you can find him reading books on world history, walking his dog Pepper, or searching for the best cheeseburger in New York City.