Blisswood Double Mattress Gel Memory Foam 4ft 20cm Thick Hypoallergenic Review: Our In-Depth Sleep Test Verdict

For weeks, my partner and I had been locked in a familiar cycle of restless nights. Our old mattress, a relic from a bygone era of sleep technology, had developed dips and troughs that seemed perfectly designed to contort our spines into unnatural positions. I’d wake up with a dull ache in my lower back, while my partner, a notoriously hot sleeper, would constantly toss and turn, complaining about overheating. We were waking up more tired than when we went to bed, a frustrating reality that was starting to impact our daytime energy and mood. The search for a replacement felt daunting; we needed a solution that offered robust support, addressed the overheating issue, and wouldn’t transmit every little movement from one side of the bed to the other. It was this exhaustive search that led us to test the Blisswood Double Mattress Gel Memory Foam 4ft 20cm Thick Hypoallergenic, a mattress that promises a modern, multi-layered solution to these exact problems.

What to Consider Before Buying a Memory Foam Hybrid Mattress

A mattress is far more than just a piece of furniture; it’s a foundational investment in your health and well-being. It is the key solution for achieving deep, restorative sleep, which in turn affects everything from cognitive function and mood to physical recovery and immune strength. A quality mattress can alleviate chronic back pain, reduce pressure points on joints, and provide an undisturbed sanctuary for rest. The primary benefits of a modern hybrid like this one lie in its ability to combine the contouring comfort of memory foam with the supportive structure of an underlying core, aiming to deliver the best of both worlds.

The ideal customer for this type of product is someone facing common sleep challenges: couples who are easily disturbed by a partner’s movement, individuals who tend to sleep hot on traditional foam mattresses, or anyone seeking targeted relief for back, shoulder, or hip pain. Its medium-firm rating makes it a versatile choice for back and side sleepers. However, it might not be the perfect fit for those who staunchly prefer an ultra-firm, board-like surface or, conversely, an exceptionally plush, sinking feeling. People who need a highly specialised orthopaedic solution or have a budget for premium, all-natural latex models might also consider other alternatives.

Before investing, consider these crucial points in detail:

• Dimensions & Space: The Blisswood Double Mattress Gel Memory Foam 4ft 20cm Thick Hypoallergenic measures 120 x 190 cm. This is a “small double” or “4ft” size, which is an excellent space-saving solution for smaller bedrooms, guest rooms, or apartments where a standard double would feel overwhelming. Always measure your bed frame precisely to ensure a snug and proper fit before purchasing.
• Firmness & Performance: This mattress is described as medium-firm, which we found to be an accurate assessment. This level of firmness is widely considered the sweet spot for providing both comfort and crucial spinal support. The key performance feature here is the 7-zoned support system, designed to offer different levels of firmness for different parts of your body, which is critical for proper alignment.
• Materials & Durability: The mattress features a complex 7-layer hybrid construction. This includes a gel-infused memory foam top layer for cooling, various support foams for comfort and rebound, and what appears to be a Bonnell coil base for foundational support and airflow. The OEKO-TEX 100 certification ensures the materials are free from harmful substances, and the 10-year warranty speaks to the manufacturer’s confidence in its long-term durability.
• Ease of Use & Maintenance: As a “bed-in-a-box,” it arrives conveniently compressed and rolled. The main long-term care benefit is the zip-off, machine-washable top cover. This feature is a game-changer for hygiene, making it incredibly simple to keep your sleeping surface fresh and clean from allergens, dust mites, and accidental spills.

While the Blisswood Double Mattress Gel Memory Foam 4ft 20cm Thick Hypoallergenic is an excellent choice, it’s always wise to see how it stacks up against the competition. For a broader look at all the top models, especially if you’re a side sleeper, we highly recommend checking out our complete, in-depth guide:

First Impressions: Unboxing the Future of Sleep

The Blisswood Double Mattress Gel Memory Foam 4ft 20cm Thick Hypoallergenic arrived in a surprisingly compact and manageable box, a testament to the convenience of modern vacuum-compression technology. Moving it into the bedroom was a far cry from the awkward, two-person struggle associated with traditional mattresses. Once we carefully cut away the plastic wrapping, the mattress began to expand with a satisfying hiss. The initial look is clean and modern, with a soft-to-the-touch white knitted top and stylish grey side panels. We did notice a faint “new product” scent, which is common for memory foam products (often called off-gassing), but it was minor and dissipated completely within a day after we left it to air in a well-ventilated room. As per the instructions, we allowed it a full 48 hours to reach its final 20cm thickness and shape. The wait requires patience, but it’s a critical step to ensure the foam cells fully recover and provide their intended support. Once fully expanded, it felt substantial and ready for its first test run. You can see the unboxed design and check current availability here.

A Deep Dive into the Blisswood Mattress’s Performance

A mattress’s true worth is only revealed after several nights of sleep, across different positions and conditions. We spent over a week testing the Blisswood Double Mattress Gel Memory Foam 4ft 20cm Thick Hypoallergenic, focusing on its core promises: support, cooling, and motion isolation. Here is our detailed breakdown of how it performed.

The 7-Layer Hybrid Construction: A Symphony of Comfort and Support

The term “7-layer” can sound like marketing jargon, but in our experience with the Blisswood, each layer plays a distinct and crucial role. The top layer is the soft, breathable knitted fabric cover. It feels pleasant against the skin and is designed to allow air to circulate freely. Being able to zip it off for washing is a significant practical advantage for long-term hygiene.

Beneath this is the star player for hot sleepers: the 2cm gel-infused memory foam. This isn’t just standard memory foam; the infusion of cooling gel particles is specifically engineered to draw heat away from the body and disperse it, preventing that “stuck in warm sand” feeling that plagues lesser foam mattresses. Below this, a layer of “breathable air memory foam” further enhances this cooling effect. During our testing, this combination worked remarkably well. My partner, who usually wakes up warm, reported a noticeable improvement in temperature comfort throughout the night.

The core of the mattress is where the support structure comes to life. It includes layers of high-density soft foam and high-rebound support foam. These layers provide the contouring effect—gently cradling the body’s curves—while also offering a responsive push-back that prevents you from sinking too deeply. This rebound is essential for ease of movement; we never felt “trapped” in the mattress. The bottom layers consist of a durable base and a non-slip fabric, which kept the mattress securely in place on our slatted bed frame. Though the specs mention a Bonnell coil, it likely forms the very base of this hybrid structure, providing the foundational stability and durability that pure foam mattresses sometimes lack. This hybrid design is what gives the mattress its balanced feel, and this advanced construction is a feature that really sets it apart at its price point.

Zoned Support and Pressure Relief: A Dream for Aching Backs?

This is where the Blisswood Double Mattress Gel Memory foam 4ft 20cm Thick Hypoallergenic truly shines. A single slab of foam offers uniform support, but our bodies are not uniform. The 7-zoned system intelligently addresses this by dividing the mattress into distinct sections, each with a slightly different firmness level to support the head, shoulders, back, hips, legs, knees, and feet correctly.

As a combination sleeper, I tested this thoroughly. When lying on my back, I could feel the mattress offering firmer support under my lumbar region, preventing my lower back from sinking in and maintaining a neutral spine position. This was the most immediate and noticeable benefit; the morning backache I had grown accustomed to was significantly reduced after just two nights. When I shifted to my side—my dominant sleeping position—the zoned system proved its worth again. The area under my shoulders and hips felt slightly softer, allowing them to sink in just enough to relieve pressure points while the core remained supportive. This is critical for side sleepers to avoid waking up with a sore shoulder or hip. We found the spinal alignment to be consistently excellent, confirming that the zoned support isn’t just a gimmick; it’s a functional design that delivers tangible results in comfort and pain relief. The focus on spinal alignment makes it a compelling choice for many.

The Cooling Factor: Does the Gel Memory Foam Beat the Heat?

One of the biggest historical complaints against memory foam is its tendency to retain body heat. Traditional memory foam is composed of dense, closed cells that can trap air and warmth, leading to an uncomfortably hot and sweaty night. The Blisswood Double Mattress Gel Memory foam 4ft 20cm Thick Hypoallergenic directly confronts this issue with its gel-infused top layer and additional breathable foam layers. The theory is that the gel beads absorb and pull heat away from the surface, while the open-cell structure of the foams below promotes airflow to dissipate that heat.

In practice, the results were impressive. While it doesn’t feel actively “cold” to the touch like some high-end cooling technologies, it remains remarkably temperature-neutral throughout the night. Even with a thick duvet, we never experienced that gradual build-up of heat that forces you to kick the covers off. My partner was particularly pleased, noting that they slept more deeply without the usual temperature-related interruptions. For anyone who has written off memory foam because they are a hot sleeper, this mattress proves that modern material science has effectively solved the problem. It provides all the contouring benefits of foam without the thermal drawback, making for a much more restful and uninterrupted sleep cycle. This cooling capability is a key reason for our strong recommendation.

Motion Isolation and Everyday Practicality

For anyone sharing a bed, motion isolation is non-negotiable. It’s the mattress’s ability to absorb movement on one side so it doesn’t ripple across and disturb the person on the other side. This is where the foam layers of the Blisswood excel. We performed the classic “glass of water” test, and the results were great, but the real-world test is more important. My partner tends to get up earlier than I do, and on our old spring mattress, I would feel every move. On the Blisswood, I slept right through. The foam layers effectively deaden vibrations, creating two independent sleep zones.

Beyond the technical performance, the day-to-day practicality is also a major plus. The hypoallergenic properties and the OEKO-TEX certification provide invaluable peace of mind, ensuring our sleeping environment is free from harmful chemicals and allergens. The durability of the materials, backed by a 10-year warranty, suggests this is a long-term investment, not just a temporary fix. These practical features, combined with its stellar performance, elevate the Blisswood Double Mattress Gel Memory foam 4ft 20cm Thick Hypoallergenic from a good mattress to a genuinely excellent one. Check the latest price and see its full feature set.

What Other Users Are Saying

While our hands-on testing forms the core of our review, we always look to broader user feedback to see if our experience is widely shared. The sentiment for this mattress is overwhelmingly positive. One user summed up their initial experience succinctly, stating it’s “Amazing, I love it so far 👏”. This mirrors our own immediate satisfaction with the comfort and support it provided from the very first night.

This positive feedback often centres on the mattress’s excellent value and its effectiveness in alleviating back pain, confirming our findings regarding the 7-zoned support system. The most common points of critique, which are typical for any bed-in-a-box product, revolve around the initial expansion period. Some users express impatience with the 24-72 hour wait, and a few mention the faint “new mattress” smell upon unboxing. However, these are temporary inconveniences that are inherent to the product type and, in our view, a small price to pay for the convenience and long-term comfort delivered.

How Does the Blisswood Compare to the Competition?

No product exists in a vacuum. To give you the clearest picture, we’ve compared the Blisswood Double Mattress Gel Memory Foam 4ft 20cm Thick Hypoallergenic against three distinct alternatives available online. This helps to highlight its unique strengths and clarifies who might be better served by a different type of product.

1. Inofia Double Folding Mattress 15cm

The Inofia Folding Mattress serves a completely different purpose. It’s designed for portability and temporary use—think guest visits, camping trips, or a movable floor lounger. While it uses memory foam, its 15cm thickness and foldable design prioritize convenience over the sophisticated, layered support of the Blisswood. If you need a primary mattress for nightly use and optimal spinal health, the Blisswood Double Mattress Gel Memory Foam 4ft 20cm Thick Hypoallergenic is unequivocally the superior choice. However, if your main need is a comfortable, high-quality, and easily storable solution for occasional guests, the Inofia is an excellent and practical alternative.

2. BEDZONLINE 3ft Single Firm Orthopaedic Memory Foam Mattress

The BEDZONLINE mattress offers a more direct comparison but for a different user. This is a 3ft single mattress with a firm, orthopaedic focus, constructed from reflex and memory foams without a hybrid coil system. It’s geared towards solo sleepers who require or prefer a significantly firmer sleeping surface for maximum support. In contrast, the Blisswood is a small double (4ft), making it suitable for couples, and its medium-firm, zoned construction provides a more nuanced, pressure-relieving support that many side and back sleepers find more comfortable than a uniformly firm mattress. Choose BEDZONLINE for a single, firm, no-frills orthopaedic bed; choose Blisswood for a more advanced, balanced, and cooler sleep experience for one or two people.

3. Direct Manufacturing Heavy Duty King Mattress Storage Bag

This product is not a mattress but an essential accessory that highlights a practical consideration of mattress ownership. The Direct Manufacturing Storage Bag is designed to protect a mattress during a move or while in storage. This is a perfect complementary product for an investment like the Blisswood Double Mattress Gel Memory Foam 4ft 20cm Thick Hypoallergenic. While you wouldn’t sleep on the bag, purchasing one alongside your new mattress is a wise decision to protect it from dust, moisture, and damage if you anticipate moving house or needing to store it in the future. It’s about protecting your investment in good sleep.

Our Final Verdict: Is the Blisswood Double Mattress the Right Choice for You?

After extensive testing, we can confidently say that the Blisswood Double Mattress Gel Memory Foam 4ft 20cm Thick Hypoallergenic is an outstanding performer that delivers on all its key promises. It masterfully blends pressure-relieving comfort with essential, zoned support, making it an exceptional choice for anyone suffering from back pain or restless nights. The gel memory foam technology effectively solves the overheating problem common to older foam mattresses, and its superb motion isolation makes it a godsend for couples.

We highly recommend this mattress for individuals or couples seeking a high-value, medium-firm sleeping solution for a smaller bedroom. It is particularly well-suited for back and side sleepers who will benefit most from the 7-zoned support system. While the initial expansion period requires patience, the resulting sleep quality is more than worth the wait. If you are ready to transform your sleep and wake up feeling refreshed and pain-free, this mattress is a fantastic investment in your well-being. Find out more and check the latest price to make it yours today.

Last update on 2025-10-27 / Affiliate links / Images from Amazon Product Advertising API