Dosleeps Extra Thick Memory Foam vs Silentnight 7 Zone Memory Foam
We compare the Dosleeps Extra Thick Memory Foam and the Silentnight 7 Zone Memory Foam across every dimension that matters - our scores, the key specs, and how each performs on the things you will actually notice day to day.
At a glance
| Dosleeps Extra Thick Memory Foam | Silentnight 7 Zone Memory Foam | |
|---|---|---|
| Our score | 8.9/10 | 6.5/10 |
| Best for | Value-focused buyers after a medium-firm everyday sleep surface in a orthopaedic hybrid build | Value-focused buyers after a medium-firm everyday sleep surface in a memory foam build |
| Not ideal for | Buyers set on a premium specialist mattress with a long in-home trial and white-glove delivery | Buyers set on a premium specialist mattress with a long in-home trial and white-glove delivery |
| Brand | dosleeps | Silentnight |
Comfort and Firmness
Dosleeps Extra Thick Memory Foam
Comfort and firmness on this mattress centre on its medium-firm feel, paired with a 26cm depth. The medium-firm rating is designed to balance support with pressure relief, with the extra-thick profile helping create a more cushioned top layer feel without becoming overly soft. The mattress uses memory foam together with pocket sprung and high-density foam, giving a responsive comfort rather than purely contouring sink. As with all medium-firm mattresses, comfort varies by body weight and sleeping position, and heavier sleepers may find it less forgiving at first.
Silentnight 7 Zone Memory Foam
With a medium-firm feel, the Silentnight is designed to provide support without feeling overly soft. This comfort level tends to be more supportive than plush, and it may feel firmer than memory foam models that focus on a softer surface. It can suit sleepers who prefer a more responsive surface for easier position changes. Those who sink deeply or want a slow, enveloping memory foam feel may be less satisfied.
Support and Spinal Alignment
Dosleeps Extra Thick Memory Foam
Support and spinal alignment are primarily influenced by the mattress's medium-firm feel and its 26cm depth, as these features work together to help prevent excessive sinkage. For many sleepers, this combination supports a more stable neutral position for the lower back, rather than allowing the body to collapse inward. The 9-zone orthopedic support also plays a role, since zoning is designed to distribute pressure across key contact areas. Alignment can still vary by sleeping position, body shape and personal comfort preference. Those who prefer very soft cushioning may experience less contouring around the hips.
Silentnight 7 Zone Memory Foam
The medium-firm feel described earlier influences how effectively the mattress supports the body, particularly in areas that benefit from consistent pressure relief while keeping the spine in a more neutral position. Side sleeping can help prevent the hips from sinking too far, which may reduce the likelihood of strain in the lower back. Back sleeping relies on the even zoned construction implied by the "7 zone" approach to support the lumbar area without an overly hard surface feel. Spinal alignment can still vary with body weight and how pressure is distributed across the mattress, because firmness and support responses are linked to individual build and sleeping position.
Materials and Construction
Dosleeps Extra Thick Memory Foam
Materials and construction on the dosleeps mattress use an orthopaedic hybrid layout, combining pocket sprung support with high-density foam layers for a medium-firm feel. The mattress is 26cm deep. It includes an extra thick memory foam comfort layer over pocket springs, designed to help maintain zoning across different parts of the body. High-density foam supports the structure to help reduce sink-in and keep alignment steadier than softer builds. The edges also use the spring-foam combination for stability when sitting. The main potential downside is that a medium-firm feel may feel less plush for side sleepers who want more contouring.
Silentnight 7 Zone Memory Foam
Memory foam construction on the Silentnight is designed to contour around the sleeper while maintaining a medium-firm feel. It is delivered rolled and boxed, and the outer finish is white, with fabric type and stitching details not stated. Layer-by-layer build information remains unclear.
Temperature and Breathability
Dosleeps Extra Thick Memory Foam
Temperature control is a key practical consideration with the dosleeps Extra Thick Memory mattress, particularly as it is designed to be breathable and temperature-regulating. At 26cm deep, the medium-firm feel supports more even weight distribution, which can help reduce localized heat buildup. The breathable construction allows air to move through the sleep surface, so the mattress is less likely to trap warmth during warm nights. Memory foam comfort layers can still feel warmer than very open spring designs, especially in consistently hot rooms. Bedding adjustments may be needed, such as using lighter covers, if warmth is noticed during sleep.
Silentnight 7 Zone Memory Foam
Temperature and breathability can affect comfort throughout the night, as some memory foam mattresses trap more body heat than others. On the mattress, which is medium firm and made from memory foam, heat retention is likely to be a consideration for warmer sleepers. The mattress is delivered rolled and boxed, and that construction can help it sit evenly on the bed base. For improved airflow, a breathable mattress protector and regular airing of the sheets can help reduce trapped warmth, while a well-ventilated room supports comfort.
Motion Isolation and Edge Support
Dosleeps Extra Thick Memory Foam
Even with memory foam and pocket sprung support, motion isolation and edge performance still matter day to day, particularly for couples or anyone who sits close to the side of the bed. The pocket sprung system and high-density foam layers should reduce side-to-side movement compared with firmer all-foam options, so a sleeper's shifting is less likely to travel. Edge support is mainly about whether the perimeter holds weight, and the design should feel more stable than low-support foams. Because the mattress is rated medium-firm, very heavy pressure near the edge may compress more than expected.
Silentnight 7 Zone Memory Foam
Motion isolation and edge support matter because they influence whether the bed feels stable and quiet when someone moves or sits near the perimeter. The Silentnight 7 Zone Memory uses memory foam, which typically absorbs some side-to-side shifting, helping to reduce disturbances when one person changes position. Memory foam can still allow gradual sink-in, particularly towards the sides, where weight concentrates more heavily. Edge support is therefore more noticeable when sitting close to the perimeter. If a firmer rim is preferred, a memory foam mattress can feel less supportive than springier options, since movement can be quieter than on firmer foams.
Size and Depth Options
Dosleeps Extra Thick Memory Foam
Size and depth matter because they affect comfort, how much space two people have, and whether the mattress depth feels supportive on different bases. Dosleeps comes in King size at 150x200cm, so two sleepers typically get more room than smaller beds, though individual preferences vary. The mattress is 26cm deep, which helps it feel substantial rather than thin, particularly on firmer platforms. On adjustable or slatted bases, depth can change how the edges and support zones sit, so fit should be checked before purchase. Depth also affects bed height, the type of fitted sheets needed, and how easy it is to get in and out.
Silentnight 7 Zone Memory Foam
When choosing the Silentnight, size affects how much usable sleep space remains, especially if the bed is shared. Depth is an important fit consideration, but the exact depth is not provided, so dimensions should be checked before ordering. The rolled delivery indicates the mattress is easier to store temporarily, and it also means the mattress may need time to settle after unrolling.
Durability and Warranty
Dosleeps Extra Thick Memory Foam
After considering how the 150x200cm King size and the 26cm depth can affect comfort and fit on different bases, durability and warranty are practical things to check for the dosleeps mattress. As it uses pocket sprung and high-density foam, it should be more resistant to everyday sag than basic foams, although wear patterns still depend on weight distribution and rotation habits. The cover is breathable, which may help with keeping the sleep surface feeling drier, but it does not guarantee stain resistance. Warranty terms are not stated, so buyers should confirm the length, coverage, exclusions and return options before purchase.
Silentnight 7 Zone Memory Foam
Durability for the mattress depends on how it is used, supported, and cared for over time. As a memory foam mattress, it can soften with regular pressure, so correct base support matters and a sagging base can reduce its lifespan. It is delivered rolled and boxed, so it should be allowed to fully expand before use, and it should not be sharply bent during setup. Cleaning should be gentle, and spills should be blotted promptly because dampness can affect the materials.
Who Is This Mattress For?
Dosleeps Extra Thick Memory Foam
This Doesleeps king size mattress is best suited to people who want a thicker feel and supportive sleep. It measures 150 x 200 x 26cm and is described as an orthopaedic hybrid with medium-firm comfort, which suits side, back and combination sleepers who prefer medium support rather than a very soft surface. The 9-zone orthopaedic concept is designed to provide targeted support, although specific performance details are not stated. Breathable, temperature-regulating qualities can suit those who sleep warm. Couples may value motion isolation, but comfort expectations will vary with firmness preference.
Silentnight 7 Zone Memory Foam
The Silentnight's 7 Zone Memory Foam rolled mattress is best suited to sleepers who prefer a medium-firm feel, since this is stated in the product title. Made from memory foam and supplied rolled and boxed for shipping, it is designed for quicker setup at home. The mattress is available in Double size, making it suitable for couples sharing a bed or solo sleepers who want extra space. Overall, it is aimed at comfort-focused shoppers rather than niche requirements.
Dosleeps Extra Thick Memory Foam: pros
- Orthopaedic hybrid construction
- Medium-firm feel for supportive sleep
- Breathable, temperature-regulating build
- Generous 26cm deep
Cons
- Firmness feel is personal, so it may not suit every sleeper or body weight
- Budget and boxed mattresses generally offer shorter trials than premium bed-in-a-box brands
- A new-foam smell on unboxing is normal at first and needs airing
Silentnight 7 Zone Memory Foam: pros
- Memory foam construction
- Medium-firm feel for supportive sleep
- Delivered rolled and boxed for easy handling
Cons
- Firmness feel is personal, so it may not suit every sleeper or body weight
- Budget and boxed mattresses generally offer shorter trials than premium bed-in-a-box brands
- A new-foam smell on unboxing is normal at first and needs airing
Our verdict
Our pick is the Dosleeps Extra Thick Memory Foam (our score 8.9/10) - A practical mattress (orthopaedic hybrid, medium-firm feel, 26cm deep), best judged against your sleeping position, body weight and the current price. The Silentnight 7 Zone Memory Foam is still worth it if it is cheaper when you check, or if it better matches your specific needs.