When buying the best luxury mattress in the UK, one of the first decisions to make is choosing between a luxury firm mattress and a soft mattress. How do you feel when you lie down at night? So, which is better? The quick answer: It all comes down to your sleep style, body shape, and personal preference. In this article, we’ll help you decide the best sleep surface to support your own needs and lifestyle.
What is a Luxury Firm Mattress?
A luxury firm mattress is the next level up from a firm mattress in terms of comfort level scale.
A firm mattress offers just a bit more push-back while also providing the necessary give to keep your spine properly aligned. This is what we would call medium-firm, and it definitely caters well to back and stomach sleepers.

Firm mattresses: According to the Sleep Foundation, firm mattresses help keep the spine neutral and can alleviate lower back pain by preventing your hips from sinking too deeply into the bed. This is particularly crucial for heavier sleepers, who often find that softer mattresses don’t offer enough support to prevent poor sleeping posture.
At LuxeMattresses, we create our natural firm mattresses with organic latex combinations and pocketed coils to give the perfect balance of supportive comfort with the environmental benefits— something that any eco-conscious UK citizen looks for.
What is a Soft Mattress?
A cushiony mattress provides deep, sink-in comfort and contouring. It’s plush and flexible, and perfect for side sleepers who need pressure relief at the hips and shoulders. Plush mattresses conform to the body, promoting better circulation and reducing the pressure points that cause sleepers to wake up.

That said, too-soft beds can also contribute to spinal misalignment for back or stomach sleepers if not constructed properly. Therefore, the best soft mattresses for this area are those that also feature zoned support layers or firm bases beneath the cloud-like top of the mattress, providing comfort and posture correction.
If you’re a “cloud-like” lover, our luxury soft mattress provide organic wool layers, natural latex, and breathable covers that feel decadent without the overheating.
Comfort Compared: Which Mattress Feels Better?
Comfort is personal — but your body type and preferred sleep position are significant factors in how you perceive firmness:
- Side sleepers: Since they need pressure relief, most side sleepers will find soft mattresses more comfortable.
- Back sleepers typically do best on medium-firm or luxury firm beds to support their lower back.

If you sleep on your stomach, you’ll generally need something firmer to avoid a feeling of arching in your lower back.
Larger individuals (over 14 stone or 90kg) tend to favour a firmer mattress with good durability and support retention.
Ensuring your spine is moving in the right direction is key to alleviating musculoskeletal pain and helping you get a better night’s sleep.” NHS If you have existing health conditions, such as sciatica or neck pain, an unsupportive mattress can exacerbate the issue.
Hold & Durability: The Importance of Firmness
Plush Firm: While both options have a durable build, a plush firm mattress is slightly denser than a luxury firm one. Firmer foams and springs are also less likely to sag and develop body impressions over time, especially when made of natural materials ( like in our organic latex collection).
Plush mattresses, which are initially super comfortable, may lose their shape more quickly without proper support, so what’s under the cover is just as important as the beautiful padding. At LuxeMattresses.com, we utilize multi-layered foam systems and hand-tufted finishes to ensure every mattress has a long lifespan, regardless of your preferred firmness level.
Temperature Control – Which One Sleeps Cooler?
Firm mattresses also tend to sleep cooler, you lay more “on top” of a mattress instead of sinking in. So, you have a good airflow and the skin doesn’t heat up!

Plush beds (like traditional memory foam) have the potential to sleep hot from how they contour. However, gel-infused foams, open-cell structures and breathable natural materials, such as what is used in LuxeMattresses’ soft models, address this common complaint.
Harvard Health also says that sleeping in a cooler space will allow you to achieve a deeper REM, so mattress cooling technology is part of luxury design.
Motion Isolation: What About With a Partner?
If you share a bed with a partner, motion isolation is top of mind. Cushions that are substantially soft usually absorb motion a lot so they are generally ideal for people who are sensitive sleepers and get disturbed frequently.
Our hybrid luxury firm mattresses also excel in this department, featuring individually wrapped coils and multi-zone support layers that prevent motion transfer while providing support.
Which One is Recommended?
Here’s a fast overview to help you choose:
| Factor | Luxury Firm Mattress | Soft Mattress |
| Best For | Back & stomach sleepers, heavier individuals | Side sleepers, lighter individuals |
| Feel | Supportive with slight cushioning | Plush and conforming |
| Support | Excellent spinal alignment | Moderate, may lack lumbar support |
| Motion Isolation | Good with coil + foam combo | Excellent, especially with foam |
| Cooling | Sleeps cooler, less sink-in | Sleeps warmer, depends on materials |
Whatever your prefer, keep an eye out for natural materials, multi-layered support and handcrafted construction as the best luxury mattress UK shoppers can buy.
FAQs
Yes. Medium-firm to firm mattresses offer better spinal alignment and relief from back pain, according to the Sleep Foundation.
Yes — if it has zoned or reinforced layers underneath the cover, it can offer proper support while still feeling plush.
Medium-firm (or luxury firm) tends to be the most popular firmness within the UK, providing softer yet structured support.
Final Thoughts
Whether it’s the conforming, timeless comfort of a classic mattress, the added support of a firm mattress, or the plush comfort of a plush mattress, your Saatva will be comfortable and supportive. If you’re looking for the top luxury mattress in the UK, Luxe mattress sources the finest materials and arranges them into the perfect sleep system, whether you prefer it firm or soft.
Explore our range of natural luxury mattress collection and discover the perfect one for your body and sleep preferences.
