Best mattresses for side sleepers in the UK
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Strongest BedBoy Score for side sleepers belongs to the Staples Revitalise Eco Latex Pocket 3800 Mattress at 4.8 / 5. The iGel NanoTech 3500i Plushtop Mattress tracks close behind on 4.7 / 5. List prices run from £449.99 up to £1,849.99.
More than half of British adults sleep on their side, and it's the posture that asks the most of a mattress. Your whole body ends up balanced on two fairly small surfaces, the shoulder and the hip, so that's where the pressure goes. Pressure relief is the category the rubric leans on hardest here, ahead of comfort and motion isolation. That's what produced the order you're looking at.
The question is whether your spine stays in a straight line from neck to tailbone or bows into a curve, and both extremes will hurt you. Too soft and your hip sinks in, dragging the lower spine down with it and squeezing the discs all night. Too firm and the shoulder can't dip in far enough to keep the cervical and thoracic vertebrae level with the rest of the column, which loads the joint and wakes side sleepers with a stiff neck. Published spinal-alignment work using optical tracking on adult lateral sleepers (conducted on male subjects) found significant differences in resulting spine angles across mattress firmness levels, with softer and more zoned surfaces aligning closer to the supine baseline than firm flat surfaces.
The ranking runs from aggregated review data, not from an editor lying on the products. A pick does well here when side sleepers keep saying the same thing about pressure relief and comfort. Thin samples get no score at all rather than a soft one. Nobody here has slept on any of them, so weigh the order accordingly. Hip width, shoulder width, and overall body weight all move the optimal firmness band by half a step or so, which is why the home trial tells you more than the label: what suits a sixty-kilogram side sleeper with narrow hips won't necessarily suit a hundred-and-ten-kilogram one with broader hips.
Our top picks at a glance
| Mattress | Price | Firmness | BedBoy Score | Customer rating |
|---|---|---|---|---|
| Staples Revitalise Eco Latex Pocket 3800 Mattress | £1,399.99 | Medium | 4.8 / 5 | 4.5 / 5 (274) |
| iGel NanoTech 3500i Plushtop Mattress | £1,349.99 | Medium | 4.7 / 5 | 4.6 / 5 (208) |
| iGel NanoTech 5000i Plushtop Mattress | £1,649.99 | Medium | 4.7 / 5 | 4.5 / 5 (201) |
| Sleepeezee Matilda Combination Mattress | £639.00 | Medium | 4.6 / 5 | 4.7 / 5 (427) |
| iGel NanoTech 3000i Mattress | £1,149.99 | Medium | 4.6 / 5 | 4.6 / 5 (417) |
| Dream Team Fowey Pocket Sprung Mattress | £479.00 | Medium | 4.6 / 5 | 4.8 / 5 (306) |
| Dream Team Gold Prescot Combination Mattress | £499.00 | Medium | 4.6 / 5 | 4.6 / 5 (265) |
| Simply Memory Foam Pocket Sprung Pillowtop Mattress | £449.99 | Medium | 4.6 / 5 | 4.6 / 5 (73) |
| iGel NanoTech 4000i Plushtop Mattress | £1,449.99 | Medium | 4.5 / 5 | 4.6 / 5 (249) |
| iGel NanoTech 6000i Plushtop Mattress | £1,849.99 | Medium | 4.5 / 5 | 4.5 / 5 (48) |
The picks in detail
1. Staples Revitalise Eco Latex Pocket 3800 Mattress
Staples & Co mattress, medium, listed at £1,399.99. Weighted BedBoy Score of 4.8 out of 5 across 9 scored categories. Owner rating sits at 4.5 out of 5 across 274 retailer reviews.
Open the Staples Revitalise Eco Latex Pocket 3800 Mattress product page.
2. iGel NanoTech 3500i Plushtop Mattress
Scores 4.7 out of 5 on the rubric across 9 rated categories. iGel build, medium, priced at around £1,349.99. 208 retailer reviews average 4.6 out of 5.
See category-level scores for the iGel NanoTech 3500i Plushtop Mattress.
3. iGel NanoTech 5000i Plushtop Mattress
A medium mattress from iGel at £1,649.99. The composite lands at 4.7 out of 5 from 9 categories, with owner feedback running at 4.5 out of 5 over 201 reviews.
Browse the full review for the iGel NanoTech 5000i Plushtop Mattress.
4. Sleepeezee Matilda Combination Mattress
At £639.00, this medium Sleepeezee mattress carries a weighted score of 4.6 across 9 rated categories. Owner feedback averages 4.7 out of 5 across 427 entries.
Read the full BedBoy breakdown for the Sleepeezee Matilda Combination Mattress.
5. iGel NanoTech 3000i Mattress
iGel mattress, medium, listed at £1,149.99. Weighted BedBoy Score of 4.6 out of 5 across 10 scored categories. Owner rating sits at 4.6 out of 5 across 417 retailer reviews.
Open the iGel NanoTech 3000i Mattress product page.
6. Dream Team Fowey Pocket Sprung Mattress
Scores 4.6 out of 5 on the rubric across 10 rated categories. The Dream Team build, medium, priced at around £479.00. 306 retailer reviews average 4.8 out of 5.
See category-level scores for the Dream Team Fowey Pocket Sprung Mattress.
7. Dream Team Gold Prescot Combination Mattress
A medium mattress from The Dream Team at £499.00. The composite lands at 4.6 out of 5 from 9 categories, with owner feedback running at 4.6 out of 5 over 265 reviews.
Browse the full review for the Dream Team Gold Prescot Combination Mattress.
8. Simply Memory Foam Pocket Sprung Pillowtop Mattress
At £449.99, this medium Simply Bensons mattress carries a weighted score of 4.6 across 9 rated categories. Owner feedback averages 4.6 out of 5 across 73 entries.
Read the full BedBoy breakdown for the Simply Memory Foam Pocket Sprung Pillowtop Mattress.
9. iGel NanoTech 4000i Plushtop Mattress
iGel mattress, medium, listed at £1,449.99. Weighted BedBoy Score of 4.5 out of 5 across 9 scored categories. Owner rating sits at 4.6 out of 5 across 249 retailer reviews.
Open the iGel NanoTech 4000i Plushtop Mattress product page.
10. iGel NanoTech 6000i Plushtop Mattress
Scores 4.5 out of 5 on the rubric across 8 rated categories. iGel build, medium, priced at around £1,849.99. 48 retailer reviews average 4.5 out of 5.
See category-level scores for the iGel NanoTech 6000i Plushtop Mattress.
How side sleepers load a mattress
On your side, your weight goes through two fairly small surfaces, the shoulder and the hip, and your spine has to bridge the gap between them. What you want is a mattress that lets both points dip in far enough to keep that bridge level, without letting your pelvis drop so far that the line breaks.
Overall firmness rating tells you less than the layer geometry does: the depth of the comfort layer determines how far the shoulder can travel before meeting resistance; the responsiveness of the support layer below determines how the hip is held through the night; and the surface contour at the waist determines whether the natural curve of the lower back has anything to support it. Pocket-spring cores with a foam comfort layer handle this geometry well for most adult body types, since the springs flex independently under broader contact areas while the foam absorbs pressure at the smaller ones. All-foam beds suit lighter side sleepers and tend to swallow heavier ones, which is worth knowing before you fall for one in a showroom.
Frequently asked questions
What firmness is best for side sleepers?
Medium to medium-soft suits most adult side sleepers. Firm enough that your hip isn't dropping unsupported, soft enough that your shoulder has somewhere to go. I sleep on my side, so I'll add the bit the charts leave out: it's the shoulder you'll notice first, and you'll notice it at about four in the morning. Heavier side sleepers above ninety kilograms often need a step up to medium-firm to stop the pelvis sinking through the comfort layer, and lighter side sleepers under sixty kilograms can sometimes go a step down to soft without losing the spinal line. UK retailer labels for medium-firm vary between brands, so check the construction rather than the label.
Why do side sleepers wake with sore shoulders?
Because your shoulder is the smaller and more vulnerable of the two contact points, and it takes the worst of it. Most of the body's weight passes through the hip below it, and the shoulder takes the side-loaded force on top. On a mattress that's too firm, the shoulder can't dip into the surface and the rotator cuff and acromion bear the load all night. The fix is either a softer comfort layer that lets the shoulder settle, a memory-foam top layer that contours around it, or a pillow tall enough to fill the gap between shoulder and ear and offload the cervical spine.
How thick should a mattress be for side sleepers?
You want a deeper comfort layer than a back or front sleeper does, because your shoulder needs further to travel before it meets anything. Total mattress depth in the twenty-five to thirty-two centimetre range works for most adults, with at least seven to nine centimetres of that being the softer comfort layer rather than the firmer support core. Below twenty-two centimetres the comfort layer tends to compress through under the hip and the lower spine takes the load; above thirty-two centimetres rarely buys anything extra for side sleeping alone.
Memory foam or pocket sprung for side sleepers?
Most of us do well on a hybrid, meaning a pocket-spring core with a foam comfort layer, because it copes with the lopsided loads side sleeping creates better than either type alone. Pure pocket-sprung mattresses can feel too firm under the shoulder for lighter side sleepers; pure memory foam can feel like it's swallowing heavier ones and tends to sleep warmer than a sprung core. Lighter and warmer-running sleepers often prefer latex over memory foam if a non-hybrid is wanted; heavier sleepers usually do better on a hybrid.
Does side sleeping cause back pain?
Not on its own, no. Sleeping on your side isn't riskier than sleeping on your back for a healthy adult. What counts is what the mattress does underneath you while you're there, and that's a different question from the one most people ask. On a surface that holds the spine in line, side sleeping is the position the largest cohort of UK adults default to without specific issues. On a surface that lets the hip sink unsupported or holds the shoulder too high, side sleeping can drive lateral lower-back strain that wakes you with morning pain. Persistent or severe pain is a GP conversation regardless of mattress choice.
References
Verhaert V et al. Spine alignment in men during lateral sleep position: experimental study and modeling. Optical-tracking experimental study of vertebral alignment across mattress firmness levels in lateral sleepers, the academic anchor for the firmness recommendations on this page. https://pmc.ncbi.nlm.nih.gov/articles/PMC3265433/
Bed Advice UK (National Bed Federation consumer site). How to choose a mattress. Industry-body guidance on support, firmness and mattress construction for UK buyers. https://bedadvice.co.uk/bed-buyers-guide/how-to-choose-a-mattress/
NHS. Sleep and tiredness. Public-health overview of healthy adult sleep, hygiene practices and when sleep problems warrant a GP visit. https://www.nhs.uk/live-well/sleep-and-tiredness/
NICE. Low back pain and sciatica in over 16s: assessment and management (NG59). UK clinical guideline. Side sleepers with overlap into back pain should treat the sleeping surface as a modifiable factor in self-management. https://www.nice.org.uk/guidance/ng59
Methodology in brief
Each composite comes from manufacturer spec sheets, live retailer pricing and pooled owner reviews. Nothing on any of these lists has been slept on or handled by an editor. Category scores and the source for every number live on the how we score page.
Brands can't pay for placement, and the affiliate networks don't see the running order before it goes out. When the inputs change on the nightly refresh, the order moves with them.
Still weighing up the options?
If the shortlist above hasn't settled it for you, the mattress quiz narrows the whole catalogue by how you sleep, your build and your budget, and hands back something shorter.