✔️Customer Rating: 4.9/5 | |
✔️Mattress Advisor Score: 8.4/10 | |
✔️Type: Hybrid | |
✔️Firmness: Soft, Medium-Soft, and Medium | |
✔️Free Shipping & Returns | |
✔️100-Night Sleep Trial | |
✔️10-Year Limited Warranty |
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✔️Customer Rating: 4.9/5 | |
✔️Mattress Advisor Score: 8.4/10 | |
✔️Type: Hybrid | |
✔️Firmness: Soft, Medium-Soft, and Medium | |
✔️Free Shipping & Returns | |
✔️100-Night Sleep Trial | |
✔️10-Year Limited Warranty |
In short: The Beautyrest Harmony Lux Diamond mattress is a high-end hybrid bed designed for soft mattress aficionados. It comes in ultra-plush, plush, and medium firmnesses that work well for lightweight people and side sleepers. The generous foam layers and pocketed coils support a healthy spine while cushioning pressure points.
Harmony Lux Diamond is best for: | Harmony Lux Diamond may not be best for: |
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Simmons Beautyrest is known for their high-end hybrid mattresses. The Harmony Lux Diamond mattress is one of the most luxurious hybrid mattresses around. With thick layers of plush foam and multiple firmness options, this is one of the best hybrid beds for people who find most mattresses too firm.
In this review, we’re going to delve into everything you need to know to decide if this is your dream mattress. This includes its construction, firmness, pros and cons, and much more.
We haven’t had the chance to get our hands on the Beautyrest Harmony Lux Diamond mattress. When we bring this bed into the Mattress Advisor lab, we’ll evaluate it on 14 factors that include performance, function, and customer experience.
Learn more about Our Review Process.
Mattress Advisor Test | Score (Out of 10) |
Shipping | 10 |
Trial Period | 9 |
Return Policy | 9 |
Warranty | 9 |
Set-Up | Coming soon |
Motion Transfer | Coming soon |
Edge Support | Coming soon |
Pressure Relief | Coming soon |
Spine Alignment | Coming soon |
Responsiveness | Coming soon |
Cooling | Coming soon |
Durability | Coming soon |
Customer Service | 6.5 |
Social Impact | 7 |
The Beautyrest Harmony Lux Diamond mattress is the thickest hybrid mattress that we’ve seen. The Classic Top measures 14.25”–14.5” and the Pillow Top 17.25”–17.5”. This is compared to the typical 10” mattress. With this much foam, you can be confident that the Diamond mattress has sufficient cushion to relieve pressure at pressure points.
If you spend your nights with a fidgety partner, child, or furry family memory, your best mattress is one that minimizes the movement that you feel. With up to 8” of motion-dampening foam atop pocketed coils, the Beautyrest Harmony Lux Diamond minimizes motion transfer as well as most all-foam mattresses—quite the feat for a mattress with innerspring coils!
Combination sleepers get the best sleep on mattresses that are easy to move around on. You don’t want to feel like you’ve sunk into quicksand when switching from one position to the next. Responsiveness is the term that describes how well a mattress adapts to movements.
The Harmony Lux Diamond mattress has an incredibly lofty layer of bouncy innerspring coils that supports ease-of-movement. However, with thick foam layers on top, it’s not quite as easy to move around on the Lux Diamond as it is on innerspring mattresses or some hybrid beds. If you toss and turn a lot, you may want to look for a hybrid with thinner comfort layers.
The Beautyrest Harmony Lux mattress is much softer than your average medium-firm mattress. With multiple Diamond mattresses, there are different firmnesses to choose from. Here’s a breakdown of how soft each mattress is on a 1-10 firmness scale. The higher the number, the firmer the mattress.
There are two groups of people that tend to prefer soft mattresses like the Lux Diamond. The first are side sleepers. When you sleep on your side, you need a mattress that cradles the hips and shoulders, avoiding excess pressure. The second is lightweight people. When you weigh less than 130 pounds, mattresses feel firmer. A mattress surface must be soft enough to allow lightweight people to sink in a bit for optimal comfort.
The Harmony Lux Diamond is much softer than the average mattress. With generous foam layers, it’s designed primarily for side sleepers and anyone who desires extra cushion. Most stomach sleepers do better on a firmer mattress. Back sleepers who prefer a soft bed are also a good fit. Combination sleepers who spend most of their time on their back or side are likely to enjoy the Lux Diamond.
The Harmony Lux Diamond Series has Beautyrest’s InfiniCool cooling technology. A cool-to-the-touch mattress cover, gel-infused foam, and breathable foams and innerspring coils create a cool sleeping environment that can help hot sleepers stay cool.
Because the Harmony Lux Diamond mattress is soft with generous foam layers, it’s going to be best for people who weigh less than 230 pounds. Heavier people are likely to experience excess sagging at their hips, potentially causing lower back pain.
The Harmony Lux Mattress requires a sturdy base that’s in good condition. This includes a box spring, platform bed, or a slatted base with slats no more than 2” apart. This bed is compatible with adjustable bases.
The Harmony Lux Diamond Series consists of four mattresses that contain robust pocketed coils and numerous memory foam layers. The series is broken down into two categories: Classic Top and Pillow Top mattresses. The Classic Top comes in a medium and plush firmness and the Pillow Top in a medium and ultra-plush feel.
We’ve broken down the various layers that are found in each Diamond mattress. The thickness and materials vary by both firmness and whether it’s a Classic Top or Pillow Top.
Beautyrest Harmony Lux Diamond Classic Top
The Harmony Lux Diamond Classic Top model comes in a medium or plush feel. There are slight differences in the foam layers within. The medium Classic Top is 14.75” deep and the plush is 15”. Take a look at what’s inside.
Beautyrest Harmony Lux Diamond Pillow Top
The Harmony Lux Diamond Pillow Top mattresses have a close hugging feel. The ultra-plush Pillow Top mattress is 17.5” thick and the medium Pillow Top is 17.25”. While many of the foams and the coil support system are the same, there are also numerous differences. Let’s take a look inside.
Size | Dimensions | Weight | Price* |
Twin | 38” x 75” x 14.75”/17.5” | 62–66 lbs. | $1,599 |
Twin XL | 38” x 80” x 14.75”/17.5” | 66–105 lbs. | $1,649–$1,949 |
Full | 53” x 75” x 14.75”/17.5” | 87–134 lbs. | $1,719–$2,019 |
Queen | 60” x 80” x 14.75”/17.5” | 111–161 lbs. | $1,799–$2,099 |
King | 76” x 80” x 14.75”/17.5” | 135–205 lbs. | $2,299–$2,599 |
Cal King | 72” x 84” x 14.75”/17.5” | 142–211 lbs. | $2,299–$2,599 |
*Prices do not reflect exclusive offers or discounts. Click below to see the best price for the Beautyrest Harmony Lux Diamond mattress.
Unlike most online mattress purchases, your new Beautyrest Harmony Lux Diamond mattress isn’t going to be delivered in a box. Instead, a representative will deliver it to you, set it up, and even remove your old mattress. There may be a slight odor for a few days as the memory foam layers air out.
Here’s what you can expect when you buy the Harmony Lux Diamond mattress through Beautyrest’s online site.
Policy | Details |
Delivery | Free white glove delivery |
Trial Period | 100-night trial |
Warranty | 10-year warranty |
Return Policy | Free returns during the trial period |
Financing | Available through Affirm |
The Beautyrest mattress is shipped for free within the continental United States. Beautyrest doesn’t ship to Alaska or Hawaii. Not only is shipping free, but it comes with complimentary white glove delivery. This means you won’t have to set up your new mattress—someone else will do it for you! Old mattress removal is also included.
Most mattresses arrive in 5–14 business days.
You have 100 nights from the day you receive your new mattress to decide if you want to keep it. This 100-night trial is standard in the online mattress world. What makes this trial stand out is that there’s no waiting period, so you can return the mattress at any time during those 100 days.
The Harmony Lux Diamond mattress comes with a 10-year warranty. This warranty covers errors in workmanship or material defects, such as indentations greater than 1.5”. To initiate a warranty claim, you may call 877-399-9397 or email customerassistance@simmons.com.
To get in touch with Beautyrest, send them an email at support@beautyrest.com. They’re open on weekdays from 9 a.m. to 5 p.m. PST. During those hours, you’ll likely receive a response within an hour or two as we did. Unlike the majority of other mattress companies, there is not a phone number or live chat feature for immediate assistance.
If you discover that the Harmony Lux Diamond mattress isn’t all that you’d hoped it would be, contact Beautyrest before your 100-night trial expires at support@beautyrest.com. They will have someone come to your door to pick up and recycle your mattress. After that’s been completed and verified, Beautyrest will issue a refund.
The Beautyrest Harmony Lux Diamond mattress is an excellent choice for luxury mattress shoppers who prefer a soft feel. At up to 17.5” thick, we have yet to come across a hybrid bed with more generous foam layers. This plush, pressure-relieving foam delivers a deep body-hugging feel, much like you’d expect from an all-foam mattress.
With three firmness levels that range from soft to medium, this is a great pick for side sleepers and back sleepers who like a softer feel. We also love its soft surface for lightweight sleepers, no matter their sleeping position.
Unlike many luxuriant soft mattresses, the Harmony Lux Diamond does a good job at keeping sleepers cool. Cooling innovations are found throughout the mattress so that you don’t wake up hot and sweaty. We also love how well the thick layers of foam minimize motion transfer, helping couples sleep together without waking one another up.
What really sets this mattress apart—its sumptuous softness—makes it not the best mattress for all sleepers. Many people require a firmer mattress. People who weigh over 230 pounds and stomach sleepers should look for a more supportive bed. One of our top firm mattress picks is the Alexander Signature Series mattress.
The Beautyrest Harmony Lux Diamond is a luxury mattress with an extravagantly plush feel. The ultra-plush, plush, and medium models all boast generous layers of pressure-relieving foam, making the Diamond one of the best hybrid mattresses for lightweight people and side sleepers.
The Beautyrest Harmony Lux Diamond is Beautyrest’s best mattress for people looking for an opulently plush mattress. Let’s see how it compares to Beautyrest’s other mattresses.
The Beautyrest Harmony Lux Diamond vs The Beautyrest Black
The Beautyrest Black is Beautyrest’s premium mattress. As such, it’s more expensive than the Harmony Lux Diamond. Both are high-end hybrid beds that are thick, pressure-relieving, and supportive.
When it comes to the sleeping experience, the Lux Diamond has a softer, more enveloping sleeping surface. The Black has a more balanced feel that falls between sleeping “on” and “in” the mattress. This difference makes the Diamond better for lightweight sleepers and the Black a better fit for bigger bodies.
Learn more in our Beautyrest Black mattress review.
The Beautyrest Harmony Lux Diamond vs the Beautyrest Harmony Lux Carbon
The Beautyrest Harmony Lux Carbon Series is a slightly less posh version of the Lux Diamond Series. Both hybrid mattress lines come in a Classic Top or Pillow Top, with the Lux Diamond boasting thicker foam layers. This gives the Lux Diamond a softer, more conforming feel. While both come in medium and plush versions, the Carbon comes in extra-firm and the Diamond in ultra-plush.
To see if the Lux Carbon is the mattress for you, read our Beautyrest Harmony Lux Carbon mattress review.
The Beautyrest Harmony Lux Diamond vs the Beautyrest Black Hybrid
The Beautyrest Black Hybrid and Harmony Lux Diamond are hybrid mattresses with similar firmnesses. They both come in ultra-plush, plush, and medium, making them best for side sleepers and people who prefer a soft bed.
The Beautyrest Black Hybrid is slightly more expensive because it contains Beautyrest’s cutting edge technology. These innovations make the Black Hybrid cooler and more responsive. However, the Lux Diamond has a slightly deeper hugging feel, great for people who like an extremely plush mattress.
Find out more about the Beautyrest Black Hybrid.
The Beautyrest Harmony Lux Diamond vs the Beautyrest Harmony
The Beautyrest Harmony is the most affordable Beautyrest mattress. While it too is a high-quality hybrid, it comes in different firmnesses than the Harmony Lux Diamond. The Harmony comes in a plush, medium, and extra-firm mattress. The Harmony Lux Diamond is available in ultra-plush, plush, and medium. This means the Harmony is better for people who like a firm feel and need additional support, and the Lux Diamond for ultra-soft mattress fans.
Yes, there are many benefits to buying a Beautyrest mattress online. The first one is that you can receive exclusive discounts that you wouldn’t in-store by clicking on one of the links you see on this page. Second, retailers tend to charge return fees, while returns are free when you buy on the Beautyrest website.
We always recommend using a waterproof mattress protector on any mattress, but especially on a new one. If you spill something on a new mattress, you may void the sleep trial. A waterproof protector is also the only way to safeguard your mattress from accidents while minimizing allergen exposure and build-up.
Nope, and you don’t want to. Beautyrest mattresses are one-sided, meaning there is a distinct top and bottom. Flipping it could damage the soft layers of comfort foam. However, rotating it every six months is a good idea.
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