Harrison Spinks Diamond 25000 Pocket Mattress (Soft to Medium Feel)
Mattress
Harrison Spinks Diamond 25000 Pocket Mattress (Soft to Medium Feel)
Size
Firmness
Medium Soft
Construction
Depth (cm)
32
Layers
7
Layer Details
- Comfort Layer - Top Surface (Summer Side). The summer side puts moisture wicking cotton closest to you. In practice that means a cooler, drier feel on warm nights.
- Comfort Layer - Moisture Wicking Blend. Further layers of cotton, hemp and flax fibres draw moisture away from your body. This adds to that refreshing feel rather than letting heat and dampness build up.
- Comfort Layer - Breathability Blend. A blend of British wool, hemp and flax fibres improves durability within the comfort layers. Natural fibres like these tend to hold their loft well over time.
- Comfort Layer - Luxury Blend. Wool, mohair and cashmere sit here to deepen the indulgent feel. These are the fillings that give the surface its soft, expensive-feeling finish.
- Comfort Layer - British Wool. Layers of British wool provide snug, cushioned comfort. Wool also regulates temperature naturally, which helps across the seasons.
- Support Layer - Mini Pocket Springs. 24,300 mini springs create many more points of contact with your body. That means comfort delivered exactly where you need it, with less of the hammocking a coarser spring layer can cause.
- Support Layer - Cortec Quad Springs. 700 of Harrison Spinks' award-winning Cortec Quad springs form the core, secured in groups of four within one fabric pocket. This grouped design gives responsive, stable support at the base of the mattress.
Layer details from mattressonline.co.uk product page, September 2026.
- Space that suits a softer feel: At 75cm each for two people sharing, you can settle into the cushioned wool and cashmere layers without meeting in the middle.
- Less partner disturbance: The 24,300 mini springs respond to each sleeper individually, so an early alarm on one side transfers less movement across the UK king's width.
- Extra length for taller sleepers: At 200cm, the UK king is 10cm longer than the UK double, which stops feet hanging off for anyone approaching six foot.
- Room for a restless night: When one of you is shifting position with pillows propped everywhere, the width means the other can actually stay asleep.
- Natural fillings across a bigger surface: Cotton, hemp, flax and British wool breathe and wick moisture, so two bodies sharing the bed are less likely to build up clammy heat.
This size suits you if...
You share the bed every night and a UK double has started to feel tight, especially with a soft surface you both sink into. Perhaps you keep different hours and want an early start on one side to go unnoticed on the other, or one of you is tall enough that the 200cm length is the real upgrade. The UK king suits all of these, provided your room allows at least 2.7m x 2.9m.
Consider another size if...
Your bedroom is under our suggested 2.7m x 2.9m minimum, or you sleep alone. We'd recommend the UK double instead, which needs at least 2.6m x 2.8m and keeps the same soft to medium feel.
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Is the Diamond 25000 in a UK king wide enough for a couple?
Yes, comfortably for most. The UK king gives 75cm each for two people sharing, which is 15cm more overall width than the UK double. On a soft to medium mattress like this, where you settle into the fillings rather than lying on top of them, that extra room stops you drifting into each other overnight.
Does the UK king Diamond 25000 reduce partner disturbance?
Across the 150cm width, movement has further to travel, and the 24,300 mini springs above 700 Cortec Quad springs compress locally rather than tilting the whole surface. If one of you gets up hours before the other, a UK king on this spring system is a sensible pairing, although no mattress removes movement entirely.
Is the UK king Diamond 25000 long enough for someone over six foot?
At 200cm (the UK king measures 5ft x 6ft 6in), it gives 10cm more length than the UK double. For a sleeper around or just over six foot that usually means heels stay on the mattress rather than the edge. If you're well over six foot, the UK super king is the same length, so sizing up buys width, not length.
What room size do I need for this mattress in a UK king?
We suggest at least 2.7m x 2.9m, which is our guidance rather than the manufacturer's. In a new build master bedroom that can be tighter than it sounds once wardrobes go in, so measure the free floor space, not the room. If it won't fit, the UK double needs at least 2.6m x 2.8m.
Can two people turn the UK king Diamond 25000 easily?
Harrison Spinks doesn't publish a weight for this size, but at 32cm deep with dense natural fillings, a UK king version will be heavy. The double-sided design needs a seasonal turn, and this is firmly a two-person job. If neither of you can manage that, a smaller size such as the UK double would be more practical.