The Sea Horse mattress is a true firm mattress with excellent edge support, making it well suited to back and stomach sleepers. However, this firm feel can be uncomfortable for side sleepers. The mattress also has only average motion isolation for an all-foam mattress, it doesn’t have any cooling features, and it doesn’t come with a sleep trial.
If you’re looking for a mattress that’s better suited for all sleepers, consider a medium-firm mattress like Douglas Summit. It has the best motion isolation of any mattress we’ve ever tested, along with advanced cooling features like a moisture-wicking cover and cooling foam layers to disperse excess body heat. Douglas Summit also comes with a 365-night sleep trial, a 20-year warranty, and a free bedding bundle, all for only $1,299 for a queen size.
Sea Horse Mattress Review (2025)
Updated: March 3, 2025
Sea Horse Everlasting
Our Rating
Informed by third-party engineer testing commissioned by GoodMorning.com.
Learn more >
3.0 /10
Flippable Mattress with Very Firm Feel
Sea Horse Everlasting is a double-sided, all-foam mattress manufactured by Sea Horse, a Hong Kong–based home goods company. The mattress is priced at $1,399 for a queen size and is available in two different heights.
Canadians can purchase a Sea Horse mattress from one of the four Sea Horse store locations across the country. However, trying out the mattress in-store is essential, as Sea Horse mattresses don’t come with a sleep trial. There are also very few reviews available on the company’s website, and Sea Horse isn’t listed on third-party review sites like Trustpilot or BBB.
In contrast, competitor mattress brands like Douglas have a sleep trial and thousands of verified five-star reviews, making it easy to read about real customer experiences before making a purchase. The company is also rated “A+” on BBB and “excellent” on Trustpilot.
Our Rankings
Determined by how much the mattress sinks under applied weight. The lower the score out of 10, the softer the mattress.
8.0 /10
Determined by how much the mattress edge sinks under applied weight. A mattress with average to good edge support will score 5/10 or higher.
9.5 /10
Determined by measuring a medicine ball’s impact on the mattress. Average to good motion isolation would be 5/10 or higher.
5.6 /10
Determined by dropping a medicine ball onto the mattress. The higher the first bounce, the higher the score out of 10.
5.6 /10
Determined by entering a mattress’s cooling features into our scoring algorithm. The more effective cooling features that are present, the higher the score out of 10.
0.0 /10
Sea Horse Everlasting is an 8″ all-foam mattress with 3 layers. It’s designed to be flippable, so you choose between a “Firm” or “Soft” sleeping surface. While third-party engineers confirmed that the Firm side had a true firm feel, the Soft side fell into the medium-firm category. Heavier sleepers and those with back pain might prefer a firm feel, but if you’re a side sleeper, you might notice pressure on your hip and shoulder.
The dense support foam used in the Sea Horse Everlasting mattress resulted in both sides having excellent edge support scores. However, third-party engineer testing indicated that the mattress didn’t absorb motion as well as foam mattresses typically do. Both sides of the mattress scored just above average for motion isolation.
The Everlasting mattress isn’t advertised as having any specific cooling capabilities. Its cover isn’t removable for machine washing, but is designed to be mold-mite resistant. This is good news if you live in a humid climate.
In comparison, mattresses like Douglas Summit are equipped with a cooling mattress top cover that’s removable and machine washable. Douglas also has a medium-firm feel that’s ideal for all sleep styles. At $1,299 for a queen size, Douglas Summit comes with a 365-night sleep trial, a 20-year warranty, and a free bedding bundle—none of which are available with Sea Horse Everlasting.
Price
$799–$1,699
Firmness
Firm
Type
Foam
Shipping Cost
Varies depending on location
Trial Nights
N/A
Warranty Years
10
Firmness Score
Cooling Feature Score
Ideal For: Back Sleepers, Stomach Sleepers
Consider Sea Horse if you want…
-
A mattress with a very firm feel - A flippable mattress with two firmness options
- A mattress with excellent edge support
- A responsive mattress with minimal “sink”
- To test out a mattress in-store before you buy it
Skip this mattress if you want…
-
A sleep trial to test your mattress at home with the option to return it - A warranty longer than 10 years
- A mattress with greater motion isolation
- A mattress made in Canada
- A mattress from a company with a prominent online presence and more website reviews
You May Prefer
Douglas Summit
Our Rating:
9.7 /10
Buy any Douglas mattress today and get a FREE Comfort Sleep Bundle, 50% off Down Alternative Duvets, and 15% off all bed frames and bedding.
Sale ends April 4th. See website for details >
Compare With
Sea Horse
 |
|
|
|---|---|---|
| Price (Queen) | $1,299 | $1,399 |
| Overall Rating | 9.7 | 3.0 |
| Trial Nights | 365 | N/A |
| Edge Support Score (/10) | 7.5 | 9.5 |
| Made in Canada |
|
|
Sea Horse Mattress Sizes & Prices
| Size | Price | Dimensions | Weight |
|---|---|---|---|
Twin | $799 | 74″ x 39″ x 6″ | Unavailable |
Full / Double | $1,199 | 74″ x 54″ x 8″ | Unavailable |
Queen | $1,399 | 80″ x 60″ x 8″ | Unavailable |
King | $1,699 | 80″ x 76″ x 8″ | Unavailable |
Get a foam mattress in a full range of sizes for a lower price.
Delivery, Sleep Trial & Returns
Sea Horse mattresses are available for purchase from their retail locations. At the time of review publication, the company has four locations in Canada: Richmond, BC; Vancouver, BC; Edmonton, AB; and Markham, ON. However, not all store locations are mentioned on the Sea Horse website. If you live in one of these cities and decide to make a purchase, Sea Horse will deliver the mattress to your home for free. The mattress we ordered was personally delivered by the owner of the Sea Horse store two days after we purchased it.
If there isn’t a Sea Horse store in your area, the company says they can likely ship a mattress to your address. While purchases can’t be made from the Sea Horse website, you may be able to place an order over the phone or via email and have a Sea Horse mattress shipped directly to you. Shipping and delivery fees may apply.
Your Sea Horse mattress will come wrapped in two protective layers. The inner layer is plastic, and the outer is lined and reinforced paper packaging. The corners of the mattress are also protected by cardboard encasements. This helps protect the shape and appearance of the mattress while in transit.
When you receive your Sea Horse mattress, you’ll be the only person who has ever touched the mattress, apart from the people who made it. This is a positive if you’re conscious of germs or contamination. That said, it means the mattress comes with no sleep trial. This connection isn’t clear but was the rationale given for the lack of sleep trial when we visited the Sea Horse store. This also means you will likely not be able to return your mattress after purchase.
The Sea Horse Everlasting mattress we purchased came with a 10-year warranty. The terms of this warranty were not made clear to us, and there is limited information available online. We recommend confirming warranty details with a store clerk before you buy a Sea Horse mattress.
If you want a sleep trial to ensure your mattress is the perfect fit for you, consider Douglas Summit. All Douglas mattresses come with a 365-night sleep trial and 20-year warranty. Shipping and returns are free for most locations in Canada, and returned mattresses in good condition will be donated by the company. Your Douglas will also come with a free bedding bundle.
Courier | Various couriers |
Shipping Cost | Varies depending on location |
Delivery Time | Varies |
Sleep Trial Nights | N/A |
Warranty Years | 10 |
Return Ease | Returns not accepted |
Get the mattress with the 365-night sleep trial and 20-year warranty.
Sea Horse Mattress Construction
| Height | Layers | CertiPUR-US® Certified | Machine-Washable Cover |
|---|---|---|---|
8″ | 3 | No | No |
The Sea Horse Everlasting mattress stands 8″ tall and has 3 layers. It’s flippable, so the comfort and support layers can be switched whenever you want. However, there was no law label on the mattress for us to examine what materials were used in the mattress layers and cover.
The layers listed below presume that the “top” layer is the Firm side of the mattress.
- Layer 1: The first layer of this mattress is about 6.5″ of high-density foam. This layer acts as the comfort layer if you’re sleeping on the Firm side, or the support layer if you’re sleeping on the Soft side. This layer is what gives this mattress its very firm feel with almost no “sink.”
- Layer 2: The second layer of this mattress is about 1″ of a softer foam. When used on the Soft side, this layer will allow side sleepers to experience some slight pressure-point relief and body contouring.
- Layer 3: The final layer of this mattress is an additional 0.5″ of foam, which is designed to be the comfort layer if you decide to sleep on the Soft side. This layer of foam is quilted into the mattress’s cover.
When you use this mattress on the Soft side, you’ll benefit from the cushioning of the 1.5-2″ of softer foam layers. If you sleep on the Firm side, these layers won’t affect the mattress’s firm feel. There is also a final ⅛” layer of foam incorporated into the top cover of the Sea Horse Everlasting mattress. Because this layer is so thin, we don’t add it to our official layer count.
The mattress cover is not removable or machine-washable, so any spills or stains will need to be spot-cleaned. According to the Sea Horse website, the cover is designed to be mold-mite resistant.
The Sea Horse website also advises you to flip your mattress once a month. This may not be ideal if you prefer one side of the mattress over the other.
Get the mattress with cooling features and a machine-washable cover.
Mattress Performance Results
This allows us to accurately rate and compare the performance of the mattresses reviewed on this website. Engineer independence and operating standards help ensure their results remain unbiased, valid, and reliable. Each mattress was evaluated using the same strict mattress testing methodology to protect the overall integrity of the results. The full report has been given the official stamp of approval from an APEGA-certified engineer operating under a strict ethical code of conduct.
Mattress testing conducted outside of this professional standard poses a greater risk of validity errors or reviewer bias.
8.0 /10
9.5 /10
5.6 /10
5.6 /10
0.0 /10
Company Background
| Launched | Company HQ | Ownership | BBB Rating | Trustpilot Rating |
|---|---|---|---|---|
1985 | Hong Kong | Private | N/A | N/A |
Sea Horse is a Hong Kong-based company founded around 1985. According to its website, it was the top-selling mattress brand in Hong Kong for 35 years. Recognized for its extra-firm mattresses, the brand has gained popularity in Canada, leading to Sea Horse opening four stores across the country.
Despite the brand’s popularity in some markets, limited information about the company is available online. Sea Horse mattress reviews aren’t available on the brand’s website, and the company isn’t listed on third-party review sites like Trustpilot or Better Business Bureau. Because Sea Horse mattresses don’t come with a sleep trial, you’ll need to visit a showroom to test a mattress in person.
Choose the mattress company that’s rated “Excellent” on Trustpilot and “A+” on BBB.
Should You Buy Sea Horse Everlasting?
The Sea Horse Everlasting mattress could be a good choice if you want a very firm mattress with excellent edge support and you don’t need a sleep trial to test it at home.
However, firm mattresses aren’t well-suited for everyone. Medium-firm is the recommended firmness level for most Canadians, as it provides a balance of comfort and support. For a mattress better suited to all sleep styles, consider Douglas instead.
Douglas Summit comes with a 365-night sleep trial to test the mattress in the comfort of your own home. If it’s not the perfect fit, you can return it anytime during your trial for a full refund. Your Douglas mattress also comes with a 20-year warranty and a free bedding bundle.
Frequently Asked Questions
No, Sea Horse mattresses don’t come with a sleep trial. For this reason, you may want to visit a Sea Horse showroom to try out a mattress before making a purchase.
The Sea Horse Everlasting mattress we purchased came with a 10-year warranty. The warranty of your Sea Horse mattress may depend on which model you purchase, and your specific retailer’s policies.
Sea Horse mattresses all have a very firm feel. These mattresses tend to have thinner comfort and transition layers, with thicker support layers of high-density foam. The Sea Horse Everlasting mattress earned a firmness score of 8.0/10 on its firm side, making it well-suited for those looking for an extremely firm mattress.
However, you may find this mattress uncomfortable if you sleep on your side or experience pressure points while you sleep. The dense foam allows very little “sink” into the mattress, meaning most parts of your body will rest on top of the mattress.
A Sea Horse mattress price in Canada will vary by retailer. The Sea Horse Everlasting mattress we purchased ranges from $799 for a twin size to $1,699 for a king. A queen size retails at $1,399 before tax.
The Sea Horse website directs shoppers to their stores in Richmond and Vancouver, BC. There are also Sea Horse stores in Markham, ON, and Edmonton, AB. Once your decide to purchase a mattress in-store, they’ll have it delivered to your home for free. According to the company, they can ship from their store to “virtually any address in Canada.”
While purchases can’t be made from the Sea Horse website, you may be able to place an order over the phone or via email, and have a Sea Horse mattress shipped directly to you. However, this means that you do not get to try out the mattress before purchase, especially since Sea Horse mattresses do not come with a sleep trial. Shipping and delivery fees may apply for orders requiring cross-country shipping.
If you order a mattress in person at a Sea Horse store, they’ll have it delivered to your home for free. It comes fully expanded, wrapped in plastic, and additionally protected by a plastic-lined paper wrapper. From there, you simply have to maneuver the mattress into the room of your choice. Note that since the mattress is very firm, you may have trouble moving it around corners or through tight hallways.
READ MORE: How to move a mattress
If you’re looking for a mattress that offers a balance of support and comfort, we recommend Douglas Summit. At $1,299 for a queen size, Summit has a cooling nanofibre cover, a layer of cooling gel foam, and a balanced medium-firm feel. Douglas mattresses are also made in Canada and come with free shipping, a 365-night sleep trial, a 20-year warranty, and a free bedding bundle.
You May Prefer Our Top Pick 2025
Douglas Summit
9.7 /10
Winner!
2021 Product of the Year™
Voted the top choice overall in the Mattress-in-a-Box category through a survey of 4,000 Canadians by Kantar.The award-winning and Canadian-made Douglas mattresses offer unbeatable value and include: FREE bedding bundle, a 365-night sleep trial, and cooling gel foams for optimal comfort.
Buy any Douglas mattress today and get a FREE Comfort Sleep Bundle, 50% off Down Alternative Duvets, and 15% off all bed frames and bedding.
Sale ends April 4th. See website for details >
Top Pick 2025
Douglas Summit
Best Canadian Foam Mattress
- 365-night sleep trial, 20-year warranty, and free bedding bundle with purchase
- Best-in-class motion isolation
- Advanced cooling features like gel foam, phase-change material, and top cover nanofibres
LIMITED TIME OFFER!
Buy any Douglas mattress today and get a FREE Comfort Sleep Bundle, 50% off Down Alternative Duvets, and 15% off all bed frames and bedding.
Sale ends April 4th. See website for details >
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