Firmness
Type
Pocket Spring
Depth (cm)
29
Number of Layers
4
Trial Period (nights)
100
Warranty (years)
10
Price Range
£1,099 to £1,999
Best Sleeping Position(s)
Certifications
Assessed from the specification published by Feather & Black, captured September 2026, and from regular price comparison across our UK retail partners.
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, £1,099 upwards is 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 & what's inside
- 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.
Who's it NOT for?
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 £1,099, there are simpler pocket sprung options that will serve you perfectly well.
Sleepeezee Thames Mattress
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, the retailer listing this mattress, 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, priced from £1,099 up to £1,999 depending on the size you choose.
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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