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Emma Diamond Mattress Topper Review

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Emma Diamond Mattress Topper

Investing in a topper is one of the best ways to fix a too-firm mattress. However, choosing the wrong one can leave you with a topper even firmer than your bed. This can lead to a regretted purchase and waking up stiff and sore.

This is why I’m sharing an in-depth, quantitative review of the Emma Diamond Mattress Topper, a soft topper that may be the answer to fixing a too-firm mattress. I share how it feels and its best qualities so you can confidently choose your next topper.

Let’s begin.

Emma Diamond Mattress Topper Review: Our Rating

ScoreCategories
9Off-gassing
6Firmness
8Cooling
9.5Sinkage
9Response
8Bounce
10Edge Support
8.5Motion Transfer
9Sex (Sinkage + Edge Support + Cooling / 3)
8.5Overall Score

You can see how I test and review my mattresses here for further insight.

Emma Diamond Mattress Topper Review: Construction and Design

To start my review of the Emma Diamond Mattress Topper, I will share its construction, design, and how each layer feels and behaves.

The Emma Diamond Topper uses a breathable cover made of polyester and a bit of spandex, which allows for moisture-wicking and helps the topper cover retain its shape. I enjoyed the soft feel of the cover and how quickly it sprung back when I stretched on it slightly.

The bottom of the cover is made of polyester and polypropylene, making it slightly grippier. I could feel a bit more grab on the underside of the mattress, which helps ensure it doesn’t move while in use.

Another added benefit of this cover is its zip, which allows the top of the cover to be removed in seconds and washed. This helps keep your topper and bed in a fresher state.

Under the cover is a layer of graphite foam that helps draw away heat and moisture. Graphite is known for its cooling properties, which I enjoyed as it felt cool and kept heat at bay somewhat during my tests.

Likely one of the most essential layers of the Emma Diamond Topper is its comfort foam layer. This layer is soft and open-celled, staying responsive and light so you don’t feel like you’re stuck in your foam topper.

Overall look of the Emma Diamond Mattress Topper

Unboxing and Off-Gassing of the Emma Diamond Mattress Topper

The unboxing of the Emma Diamond Topper was a stress-free and quick process. It arrived in a small box, which I quickly moved inside and opened. Once I removed the topper from its plastic wrap, it nearly instantly sprang to its 3.1 inches height. I didn’t have to worry about waiting for it to decompress. However, giving the topper time to decompress is always recommended.

The unboxing of the Emma Diamond Topper
The unboxing of the Emma Diamond Topper

Upon opening it, I did notice a slight off-gassing smell due to the foam incorporated in the Emma Diamond Topper. However, these quickly dissipated after 6-7 hours, earning it a solid 9 in the off-gassing category. It helped that I had the topper in a ventilated room, which circulated the air and encouraged the off-gassing period to go by faster.

The Emma Diamond Topper was slightly slower to off-gas than the Emma Flip Topper, but not enough to impact performance. That means both are still an excellent choice for sleepers sensitive to ‘new manufacturer’ smells.

Firmness of the Emma Diamond Mattress Topper: How Does it Feel?

The firmness of a topper affects how soft or firm your mattress feels overall. This also involves factors like sinkage and pressure relief. To my delight, the Emma Diamond Topper is slightly soft, making my mattress underneath feel a bit more pressure-relieving than usual.

While lying on the surface, I gauged the Emma Diamond Topper to be a 6 on the firmness scale out of 10. That makes this topper suitable if you have a mattress that feels too firm or where you would like to experience more sinkage.

Firmness of the Emma Diamond Mattress Topper

Emma Diamond Topper Review: Cooling Features

Coolness is essential, especially for a topper. The last thing you want is to invest in a topper and find it makes your bed too hot for comfortable sleeping. The Emma Diamond Topper works as a cool topper because of its breathable cover and graphite foam.

Emma Diamond Topper's cover
Emma Diamond Topper's cover

In light of my tests, the Emma Diamond Topper had a coolness of 30.7 degrees Celsius, cooling my mattress by 0.5 degrees. Despite the hug the mattress provided, I never felt like I would overheat due to the foam, and I was temperature-neutral throughout the night. Due to this, the Emma Diamond Topper earned an 8 in this category.

The Emma Diamond Topper couldn’t quite keep up to the cooling powers of the Peace Lily topper, which was cooler by 2.6 degrees. That makes the Peace Lily slightly better if you’re an exceptionally hot sleeper.

For hot sleepers who want more options, consider some of the best cooling mattress toppers to make your sleeping area more comfortable.

Sinkage of the Emma Diamond Mattress Topper

Sinkage is closely linked to firmness. Firmer toppers offer minimal sinkage, which may not be as pressure-relieving. However, the Emma Diamond Topper and its softer feel give way to more of a cushioning sinkage and more pressure relief.

Derived from my tests, the Emma Diamond Topper had a sinkage of 2.4 inches. I immensely enjoyed its graphite and comfort foam layers, sinking deep for excellent pressure relief on my shoulders and hips. This generous sinkage earned the Emma Diamond Topper a rating of 9.5 in this category.

The Emma Diamond Topper was softer than the Emma Flip Topper by 0.3 inches. That makes the Emma Diamond Topper the better choice for sleepers who want a softer, more pressure-relieving feel.

Response of the Emma Diamond Mattress Topper

Response is critical for freely moving on a mattress topper. Too soft and dense foam toppers can feel restrictive. Luckily, the Emma Diamond Topper has a fast response time despite being soft and cushioning.

From my review, the Emma Diamond Topper completely recovered from compressions after only 0.3 seconds, which I rated at a high score of 9 out of 10. I could toss and turn freely without feeling inhibited or ‘stuck’ despite the cradling sinkage.

The Emma Diamond Topper responded slightly faster than the Emma Flip Topper by 0.1 seconds. That makes the Emma Diamond Topper a slightly better choice for sleepers who prefer a modern feel to their bed.

Emma Diamond Mattress Topper: Bounce

Bounce helps a topper feel even easier to move around in, in addition to response. The Emma Diamond Topper performs moderately well in this category, earning an 8.

In light of my tests, the Emma Diamond Topper had a bounce of 6.8 inches. I could move across the bed without much resistance and enjoyed the springy and soft feel of the foam.

The Emma Diamond Topper was not as springy as the Emma Flip Topper by 1 inch. However, both are still suitable as bouncy surfaces for sleepers who don’t mind a softer feel to their foam.

Bounce of the Emma Diamond Mattress Topper

Edge Support of the Emma Diamond Mattress Topper: Is it Supportive?

Edge support is critical for a top-rated mattress topper, ensuring the edges don’t become slippery from the extra stacked material. Thankfully, the Emma Diamond Topper performs well in firming up a mattress and providing reliable edges.

Derived from my tests, the Emma Diamond Topper firmed up the edges of my mattress by 0.4 inches. Due to this, I felt safer and less likely to accidentally fall out, earning the Emma Diamond Topper a solid 10 in this category.

Edge support of the Emma Diamond Mattress Topper
Edge support of the Emma Diamond Mattress Topper

The Emma Diamond Topper outperformed the Peace Lily Topper in this category by 0.3 inches. This makes the Emma Diamond Topper the winner for sleepers looking for huggable edges and a reliable surface for getting in and out of bed.

The Emma Diamond Mattress Topper Review: Motion Transfer

Motion transfer is one of the most popular reasons for investing in a mattress topper, besides making a mattress softer or firmer. The less motion transfer, the less you’ll feel the jostles from your partner while resting at night. The Emma Diamond Topper performs admirably in this category, earning a rating of 8.5.

From my tests, I made compressions across my bed up to 3 inches between me and my glass of water. At the 3-inch mark, the water finally began to shake. That means the Emma Diamond Topper absorbs most motion. I could toss and turn beside my partner, and they didn’t get disturbed much by my movement.

The Emma Diamond Topper has better motion isolation than the Emma Flip Topper on its firmer side by 0.5 inches. That means the Emma Diamond Topper is better suited for restless partners and light sleepers who want less jostling at night.

Motion transfer of the Emma Diamond Mattress Topper

Emma Diamond Mattress Topper: Performance for Sex

How a topper performs for sex is dependent on the sinkage, cooling, and edge support of a topper. The Emma Diamond Topper performs well in all three categories, earning an overall rating of 9.

There's a slight dip in performance due to its slightly lower cooling score. However, this doesn’t affect a couple too much. What’s more important is its ability to provide a responsive surface and robust edges, which the Emma Diamond Topper demonstrates.

The bottom of the topper is infused with polypropylene, which makes it slightly grippier. This is also helpful for fast movement. I found the topper did not move or shift while doing jumping tests.

How It Feels for Different Types of Sleepers

The Emma Diamond Topper, like most toppers, will feel uniquely different based on a person’s preferences, sleeping position, and weight. Heavier sleepers will likely prefer firmer toppers, while side sleepers will likely prefer softer toppers.

Below is how the Emma Diamond Topper feels in each sleeping position so you can better understand how this topper would suit you. As a reference, I am an average-weight sleeper.

Side Sleepers 

While resting on my side, I was well-cradled and enveloped by the comfort layers of the topper. It added extra sinkage that eased out the pressure points in my shoulders and hips, increasing my comfort.

The Emma Diamond Topper is best for lightweight, average-weight side sleepers under 230 pounds. It may not feel firm enough to support the hips of heavier side sleepers over 230 pounds.

Side sleeping on the Emma Diamond Mattress Topper
Side sleeping on the Emma Diamond Mattress Topper

Back Sleepers

I felt soft and buoyant while lying on my back. The mix of graphite and comfort foam layers filled the lumbar of my back and made it easy to shift my position if needed. My pressure points were evenly spread out, so I felt comfortable and supported.

The Emma Diamond Topper would suit light, average, and heavy-weight sleepers on their back. Its comfort and support make it an excellent choice for almost all types of back sleepers.

Stomach Sleepers

There was increasing sinkage while I was on my stomach, which lent itself to a fair amount of support. I could lie comfortably enough on my stomach, but I could have used a slightly firmer surface.

The Emma Diamond Topper benefits light and average-weight stomach sleepers under 130 pounds. However, average-weight sleepers who prefer a firmer surface or heavier stomach sleepers over 230 pounds may find the topper unsupportive.

Sleeping Positions: Summary

Sleeping PositionMy experience
Side SleepersI was comfortable while on my side. The foams adapted to the curves of my body, giving me a modern memory foam feel.
Back SleepersI could feel the comfort layers fill the lumbar of my back and even out my weight. I could sleep comfortably while testing this topper on my back.
Stomach SleepersI found a lot of sinkage while lying on my stomach. I was comfortable, but I could have used slightly more firmness under my hips.

Other Important Information 

A few key factors to consider before committing to the Emma Diamond Topper include its 100-night sleep trial, 2-year warranty, free delivery, and certifications.

100-Night Sleep Trial

A sleep trial allows you to test a topper in person risk-free, with longer sleep trials being preferred among sleepers. The Emma Diamond Topper comes with a reasonably long sleep trial, allowing you to return it without any hidden costs for a complete refund. This includes the shipping fee.

A 100-night sleep trial is optimal for trying out a topper and having your body adapt to it. The Emma Diamond Topper has the same length of sleep trial as the Peace Lily, which is also 100 nights.

2-Year Warranty

A warranty covers you in the case of any manufacturer defects. It also marks a worthwhile product, as a lengthy warranty means a company believes its product will outlast the warranty period.

The Emma Diamond Topper has a moderately long warranty period that covers you in the case of splits in the foam or a faulty zipper. This 2-year warranty length can give you peace of mind long after the trial period ends.

The Emma Diamond Topper is shorter in warranty length than the Peace Lily topper by 8 years. Considering this, the Emma Diamond Topper is slightly on the short side.

If a more extended warranty would give you more peace of mind, consider going with a topper like the Peace Lily. If warranties lasting a few years are suitable, or you don’t usually use warranties, the Emma Diamond Topper can be a more convenient option.

Free Delivery

The Emma Diamond Topper comes with free delivery throughout the metropolitan areas of Australia. This is helpful if you don’t want to pay for shipping or have any additional charges added to your topper. 

Free delivery also applies to returns. That means you can rest assured if you want to return the topper within the trial period. You won’t be charged to have the product shipped back.

Like the Emma Diamond Topper, the Peace Lily offers free delivery throughout Australia. That means both are suitable options for sleepers not interested in shipping charges.

Certifications

Certifications can offer peace of mind when using a product daily. The Emma Diamond Topper has an OEKO-TEX® Standard 100, Class 1 certification. This is one of the strictest criteria available and ensures the fabric, zippers, and materials are free of harmful substances.

An OEKO-TEX® certification means the Emma Diamond Topper is safer for household use and guests while offering a comfortable sleep.

The Emma Diamond Topper, Emma Flip Topper, and Peace Lily Topper all share the same OEKO-TEX® certification, making all three suitable options for sleepers concerned about safer sleep.

Summary

Deciding on a suitable topper to soften or give a luxury feel to your mattress doesn’t have to take hours of detailed research. The Emma Diamond Topper is a comfortable sleeping solution that can transform your bed in seconds.

From my tests, the Emma Diamond Topper is soft and cradling, plying comfortably under my shoulders and hips, so I experience adequate pressure relief. The sinking feeling isn’t restrictive, though. I could easily toss and turn without feeling ‘stuck’ in the topper.

The Emma Diamond Topper suits restless partners who want to feel their partner's movements less for fewer disturbances at night. The Emma Diamond Topper also suits sleepers who wish to upgrade their mattress with a modern memory foam feel.

What are your thoughts on the Emma Diamond Topper? Let us know in the comments below!

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