Firmness
Type
Pocket Spring
Depth (cm)
32
Number of Layers
4
Trial Period (nights)
Warranty (years)
5
Price Range
£249 to £349
Best Sleeping Position(s)
Certifications
Assessed from Spring King's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
The appeal here is the pairing of individually pocketed springs with natural wool. The springs move independently of one another, which means less disturbance when a partner shifts in the night, while the wool adapts to your shape and helps keep temperatures steady, useful if you tend to sleep warm. A profiled foam layer above softens with your body heat and contours to your curves for pressure relief. The medium firmness suits most sleepers, although heavier people who prefer a firmer surface may find it a little soft. Free next day delivery covers almost all of mainland UK, though a small fee applies for some addresses, and the 5-year guarantee adds peace of mind.
Key Features & what's inside
- Quilted Cover. A soft, viscose quilted cover designed to enhance breathability. In practice that means a fresher-feeling sleep surface rather than one that traps warmth.
- Profiled Foam. A generous layer of profiled foam that softens with your body's warmth and contours to your curves. You should feel gentle pressure relief at the shoulders and hips rather than a flat, unyielding surface.
- Natural Wool. Natural wool adapts to your body shape while adding a touch of bounce. Wool is naturally temperature-regulating, which means it helps you stay warm in winter and cooler in summer.
- Pocket Springs. Individually pocketed springs work completely independently of one another, which means support tailored to each part of your body. It also reduces motion transfer, so you feel less of a partner's movement.
Layer details from mattressnextday.co.uk product page, September 2026.
Who's it NOT for?
If you prefer a distinctly firm or distinctly soft feel, this medium mattress may not suit, particularly heavier sleepers who often need firmer support. It also lacks memory foam's deep sink-in feel, so if you like being cradled rather than gently supported, an all-foam design may be a better fit.
Spring King Wool Luxury Pocket Mattress
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Is the Spring King Wool Luxury Pocket Mattress firm or soft?
It has a medium feel, which suits most back and side sleepers. Lightweight sleepers should find enough give from the profiled foam layer, although anyone who needs a firmer surface, such as heavier stomach sleepers, may find it a little soft.
How deep is the Spring King Wool Luxury Pocket Mattress?
It measures 32cm deep, a substantial build for the price. Worth bearing in mind when buying fitted sheets, as shallower ones may not stretch over it comfortably.
What sizes does the Spring King Wool Luxury Pocket Mattress come in?
Four UK sizes are available: Single, Double, King and Super King. Prices range from £249 to £349 depending on the size you choose.
Does the Spring King Wool Luxury Pocket Mattress have a guarantee?
Yes, it comes with a 5-year guarantee. It is also certified fire resistant to the BS7177: 2008 standard for domestic use and is hypoallergenic, which is reassuring if you suffer from allergies.
Is the Spring King Wool Luxury Pocket Mattress good for hot sleepers?
It should help. The natural wool layer regulates temperature and the viscose quilted cover enhances breathability, so it sleeps fresher than many foam-heavy designs. That said, the profiled foam softens with body warmth, so it is temperate rather than actively cooling.
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