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Yaasa Mattress Review

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California-based Yaasa Studios is a fairly new name in the sleeping sphere, having debuted its line of candles, throws, adjustable beds and mattresses just this past May. I took a look at the brand’s adjustable bed earlier this month and decided today would be a great time to take a peek at its flagship mattress.

Keeping with the brand’s mission to adapt to its customers needs, the Yaasa Mattress comes in two firmness levels: Soft and Firm. For the purpose of this review, I checked out the soft option, putting it through a series of tests to get a sense for its feel and to figure out whether or not it could be the perfect bed for you!

Continue reading below for my full review of the Yaasa mattress. Don’t have time to read it all? Click here to skip to the bottom and check out my review summary.


CONSTRUCTION

The Yaasa is built with a hybrid design, featuring both foam and pocketed coil layers for a total of 12” of comfort. This construction is meant to highlight the best features of both materials, creating a sleeping experience that’s as pressure-relieving as it is supportive.

To see how well the Yaasa pulls off this difficult task, let’s dive straight into these different layers.

Cover – The cover is built with Tencel, a cotton substitute that’s super-soft and wicks moisture away from the sleeper. Not only does this material help with cooling throughout the mattress, but it also creates wonderful breathability.

Yaasa Cover

Close up of the cover of the Yaasa mattress

Comfort Layer – The comfort layer is made up of 2” of the brand’s proprietary Infinity Foam. The material has a similar feel to memory foam in that it has a slow response to pressure and produces pressure-relieving body contouring. This layer also features a gel infusion, which helps to combat the overheating properties of the material and keep things cool.

Transition Layer – Directly below the comfort layer you’ll find 1” of Energex foam, which is known for its quick response to pressure. The main function of this section is to transition the sleeper from the soft Infinity Foam up top into the pocketed coil system below.

Support Layer – Speaking of which, the support layer of the Yaasa is comprised of 8” of individually wrapped pocketed coils. This section imbues the hybrid with bounce and support, ensuring that the sleeper’s never going to feel too stuck in the bed. Plus, the fact that the coils are individually wrapped means they’ll not only extend the body contouring of the comfort layer into the rest of the mattress, but they’ll also work to isolate motion. The spaces between the pockets also encourages quality airflow throughout the structure.

Foundation Layer – And last but not least, the base of the bed, which is made up of 1” of high-density poly foam. This layer gives stability to the mattress and acts as a landing pad upon which the pocketed coils can react.

Yaasa Construction Fix

Showing the layers of the Yaasa mattress

Firm Version

As I mentioned in the intro, this construction is for the softer version of the Yaasa Mattress. Below, I’ll quickly outline the specifications for the firmer mattress:

Comfort layer – 1” of the brand’s proprietary Infinity Foam.
Bounce layer – 2” of responsive all-natural latex.
Support Layer – 8” of the brand’s proprietary Quantum Edge Coil System.
Base layer – 1” of high-density support foam.

The main difference to note between the two versions is that the firmer model is going to have more bounce thanks to the layer of latex foam. It’ll also feature less sinking, as the comfort layer has been reduced by an inch.

FIRMNESS

After taking a look at the construction of the Yaasa, let’s chat about the firmness and feel. I started off by applying light hand pressure to the mattress and found that I was immediately interacting with the soft Infinity Foam layer. This material contoured snuggly around my hand and provided excellent pressure relief and comfort. Pressing in further, I encountered the pocketed coil system, which lifted me up and out of the structure.

Yaasa Hand Press

Pressing into the Yaasa mattress

Since people of different body types and shapes will feel firmness differently, I enlisted three other people to come and help me test out the firmness of the Yaasa. Each one of them took a turn lying on the bed and then reported back to me their own personal firmness rating, which I compiled on a graph beside my own.

This will hopefully give you a better sense of the firmness range you can expect from the mattress!

Yaasa Firmness Graph

Showing the firmness ratings of the Yaasa from four testers

As you can see in the graph, my testers were mostly in agreement about the firmness of the Yaasa, giving it an average rating of 5.75. When compared to the industry standard of 6.5 for medium firmness, it’s clear that this bed is just a hair softer than medium firm.

I personally gave the mattress a 5.5, finding it to have a soft feel. When you first lie on the mattress, you’re likely to sink through the top layers as you experience the comforting hug of the brand’s Infinity Foam. However, before you plunge too deep into the bed, you’ll start to feel the buoyant lift of the pocketed coil system, which will keep you on top of the mattress. This combination of pressure relief and support will suit a lot of different sleepers, but could be especially good for those of you who doze in multiple positions throughout the night.

Keep in mind that if you like what you’ve read thus far but like a firmer mattress, you can always check out the other Yaasa model.

PRESSURE MAP

Rather than keep talking about the Yaasa’s feel, I thought I’d give you a visual representation of where you might feel pressure points form while lying on it.

To do this, I placed a pressure map on top of the bed and lied on my back, side and stomach. You can see the results on the image below where pressure is represented from blue (low pressure) to red (high pressure).

Yaasa Pressure Map

Pressure map results on the Yaasa

Back – Lying on my back, I felt some instant pressure relief from the comfort layer. This section contoured nicely to my body and filled in the space at my lumbar region, which is a good thing for back sleepers to note. In spite of this sinkage, I was able to move between different positions with ease, thanks to the supportive bounce of the pocketed coil system.

Side – As you can see in the graphic, once I rolled onto my side, I didn’t experience too much pressure at my shoulders or hips, typical problem areas for side sleepers. Since this is the softer version of the Yaasa, I was really able to sink in through the Infinity Foam layer and enjoy some great relief. In fact, I’d say these are some of the best pressure map results I’ve seen.

Stomach – Once I got to my stomach, I did begin to feel some pressure forming at my chest and hips. Stomach sleepers typically want to go for a firmer mattress, which will keep their spines in a comfortable alignment and their hips on top of the bed. That being said, if you’re a stomach sleeper who likes what you’ve read about the Yaasa thus far, I’d suggest checking out the firmer version of this mattress.

Hip and shoulder pain? Check out my top picks for side sleepers.

MOTION TRANSFER

Now let’s talk about motion transfer. This is essentially the intensity of movement that’s detectable from one side of the bed to the other, and could make a lot of difference for you if you’re planning to share your mattress with a partner.

To illustrate this motion transfer, I dropped a 10 lb. steel ball from heights of 4 inches, 8 inches and 12 inches and measured the disturbance it caused: the bigger the lines, the bigger the disturbance.

Yaasa Motion Transfer

Results showing the disturbance transferred across the Yaasa when a 10 lb ball is dropped from heights of 4, 8 and 12 inches

These are fairly good results, with the four and eight inch drops showing particularly low motion transfer with just a bit of a spike at the 12 inch drop, which is to be expected. The comfort layer and pocketed coils work in tandem to isolate movement throughout the entire structure, ensuring that when your bed mate sneaks out in the middle of the night for that last slice of cake, you’re not likely to feel too much disturbance.

SINKAGE TEST

When most people buy a new bed, they want to know whether they’ll feel like they’re sinking “into” the mattress or sleeping “on top” of it. To give you a sense of how much sinkage you’ll experience while stretched out on the Yaasa, I placed four balls of varying sizes and densities (a 6 lb medicine ball, a 10 lb steel ball, a 50 lb medicine ball, and a 100 lb medicine ball) on the mattress and measured how much they compressed the surface.

The size, weight and density variations among the balls are meant to simulate both different sized sleepers and body parts.

Yaasa Sinkage

Showing the sinkage of balls weighing 6 lbs, 10 lbs, 50 lbs and 100 lbs on the Yaasa

  • 6 lb medicine ball: 1.5 inches of sinkage.
  • 10 lb steel ball: 2.5 inches of sinkage.
  • 50 lb medicine ball: 4 inches of sinkage.
  • 100 lb medicine ball: 6 inches of sinkage.

The results are a bit above average for the lighter balls, but not that surprising when you consider the deep contouring properties of the Infinity Foam comfort layer. As the heavier balls quickly sank through this section, they met the supportive pocketed coil system, which lifted them up and out of the mattress. All in all, this amount of sinkage is consistent with other hybrids on the market and tells me that you’ll get a nice mix of pressure relief and support from the Yaasa.

If you want something with less sinking, you might want to consider snagging the firmer version of this bed.

EDGE SUPPORT

And finally, let’s take a quick second to chat about edge support. This test is meant to illustrate how well supported you’re going to feel lying on the side of the bed, which could be an important factor for you to pay attention to if you’re planning to use the entire surface area of your mattress.

Yaasa Edge Support Back

Lying on my back on the Yaasa

Lying on my back near the edge of the bed, I felt as supported as I did in the center. Even when I scooted all the way over to the side, the pocketed coil system worked to lift me up and keep me on top of the mattress. You’ll note a bit of compression through the comfort layer in the photo above, but it wasn’t so extreme as to leave me feeling insecure in this position.

Yaasa Edge Support Side

Lying on my side on the Yaasa

Rolling onto my side, I continued to feel well supported by the Yaasa. You can really see the contouring of the comfort layer in this image, noting especially how the Infinity Foam shaped to my shoulders and hips. You can see too where this contouring ends as the comfort section gives way to the transition layer and then finally to the pocketed coil support system.

Yaasa Edge Support Forward

Sitting on the edge of the Yaasa

In this position, I wanted to simulate what it would feel like to be sitting on the bed in the morning when you’re lacing up your shoes and getting ready for the day. A lot of beds with foam components experience severe compression in this position, but I felt as though the Yaasa had pretty fantastic edge support.

BASIC INFORMATION

Yaasa Corner

Corner view of the Yaasa

  • Sleep Trial: 100 days.
  • Warranty: 10 years.
  • Shipping: Free, arrives compressed in a box.

Just getting started? Begin your mattress search with my mattress reviews breakdown.

SIZE AND PRICING INFORMATION

Yaasa Construction Press

Showing how the layers of the Yaasa handle pressure

If you’re convinced the Yaasa is the right mattress for you, the size and pricing information for the mattress are below. Please note that these prices reflect standard pricing, but you can save $50 on the purchase of a Yaasa mattress by using the code SLEEPOPOLIS.

SizeDimensionsPrice
Twin39” x 75” x 12”$600
Twin XL39” x 80” x 12”$650
Full54” x 75” x 12”$895
Queen60” x 80” x 12"$995
King76” x 80” x 12”$1,195
California King72” x 84” x 12”$1,195

IS THE YAASA MATTRESS RIGHT FOR YOU?

Yaasa Front

Front view of the Yaasa mattress

Now that we’ve taken a closer look at the Yaasa mattress, it’s time to discuss who it’d be a good fit for.

  • Breathability – If you want a mattress with breathability, look no further than the Yaasa. The moisture-wicking Tencel in the cover combined with the spacious airways in the pocketed coil system combat any overheating that might occur.
  • Pressure relief with bounce – The Yaasa’s hybrid design is going to bring you a unique blend of both pressure relief and supportive bounce, a combination that could be ideal for a wide range of sleepers.
  • Works well with adjustable bed – If you’re looking to pair your mattress with an adjustable bed, the Yaasa could make a great bed for you. The model is particularly well-suited to Yaasa Studios’ very own adjustable bed, just keep in mind the two products are sold separately.

For more information on the Yaasa, check it out here!

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Logan Block

Logan Block

Logan is the director of content at Sleepopolis and the main mattress man around these parts. He's a big fan of sleeping in many sleeping positions and weightlifting.
Logan Block

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