Sleepeezee Thames Mattress
The Sleepeezee Thames is a medium-firm tension pocket sprung mattress with a pillow top over two layers of British wool from Romney sheep.
- Soft pillow top, medium-firm support
- Wool helps regulate temperature
- Minimises partner disturbance
£989
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Beneath the soft top and two layers of British wool from Romney sheep, the Sleepeezee Thames has pocket springs and a layer of 1,000 nano springs, 2,870 springs in total, which means the mattress can adapt to your shape rather than pushing back in one uniform way. At 29cm deep with a premium damask cover, it feels like a traditional, well-made bed rather than a modern foam one. Sleepeezee has held a Royal Warrant, supplying HM King Charles III for more than 60 years, which is reassuring at a premium starting price.
Mattress specifications
Firmness
Medium Firm
Type
Pocket Spring
Depth (cm)
29
Number of Layers
4
Trial Period (nights)
100
Warranty (years)
10
Price Range
£989 to £1,799
Best Sleeping Position(s)
Back Sleeping
Stomach Sleeping
Combination Sleeping
Certifications
Assessed from the specification published by Feather & Black, captured September 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
Choose the Thames if you want the feel of a traditional pocket sprung mattress with a softer surface. The pillow top gives an indulgent first impression, while the medium-firm tension underneath keeps your spine properly supported, so you sink into the top rather than through the whole mattress. Wool is naturally breathable and helps regulate temperature, useful if you tend to run warm at night. The 1,000 nano springs add a second, finer layer of contouring beneath the main springs. Yes, it's a real investment, but the spring count, natural fillings and 29cm depth justify it better than most. If you buy through Feather & Black, they list a 100-night comfort promise and a 10-year guarantee.
Key features & layer details
Pillow top
A soft, cloud-like pillow top sewn onto the surface, which means you get a plush, cushioned feel the moment you lie down. It softens the medium-firm tension underneath without undermining it.
Wool layers
Two layers of wool from Romney sheep, a breed native to Kent. Wool breathes and wicks moisture, which helps keep you at a steadier temperature through the night.
Pocket springs
Individually pocketed springs that respond to your shape and movements. Because each spring moves on its own, you get support where you press down and less disturbance when a partner shifts.
Nano springs
A layer of 1,000 smaller nano springs that contour more closely to your body. They fine-tune the support from the main springs, particularly around shoulders and hips.
Layer details from featherandblack.com product page, September 2026.
Best suited for?
Side sleepers
The 1,000 nano springs contour closely beneath the main springs, fine-tuning support around shoulders and hips, while the soft pillow top cushions those pressure points.
Warm sleepers
Two layers of Romney wool breathe and wick moisture, which helps keep your temperature steadier through the night if you tend to run warm.
Couples
Individually pocketed springs move on their own, so you get support where you press down and less disturbance when your partner shifts.
Combination sleepers
Medium-firm tension under the pillow top lets you sink into the surface rather than through the mattress, which suits changing position through the night.
Back sleepers
The medium-firm spring tension underneath the soft top keeps your spine properly supported, so you rest on the surface without sinking too far.
If you prefer a very firm, flat sleeping surface, the pillow top may feel too soft on first contact. Pillow tops also can't be flipped, so you're relying on rotation alone. And if your budget sits well under the starting price, there are simpler pocket sprung options that will serve you perfectly well.
Save on an earlier or ex-display model
Some retailers still sell the earlier version of this mattress, or ex-display and returned stock at a lower price. These are the sizes where it costs less than the current model's best price.
Sleepeezee Thames Mattress
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FAQ's
How firm is the Sleepeezee Thames mattress?
It's a medium-firm tension, softened at the surface by a pillow top. That combination suits most back and side sleepers, although anyone who likes a very firm feel may find the top a little too plush.
How many springs does the Sleepeezee Thames have?
It contains 2,870 springs in total, combining responsive pocket springs with a layer of 1,000 smaller nano springs that contour more closely to your body.
Does the Sleepeezee Thames come with a trial and guarantee?
Feather & Black offers a 100-night comfort promise and a 10-year guarantee. These are Feather & Black's own terms rather than Sleepeezee's, so check what applies if you buy elsewhere.
What sizes is the Sleepeezee Thames available in?
It comes in UK Single, Double, King and Super King.
How deep is the Sleepeezee Thames mattress?
It's 29cm deep, which is on the generous side. Standard fitted sheets should still work, but if yours are shallow it's sensible to check before it arrives.
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