Sleepeezee ActivFlex Response 2600 Memory Mattress
Mattress
Sleepeezee ActivFlex Response 2600 Memory Mattress
Size
Firmness
Construction
Depth (cm)
26
Layers
5
Layer Details
- Soft Knitted Cover. A breathable knitted cover finishes the mattress with a genuinely soft, luxurious surface feel. It also helps air move through the top of the mattress.
- Pillow Top. A sumptuous pillow top of soft polyester adds full-body cushioning before you reach the working layers below. This is where the plush, sink-in first impression comes from.
- Staycool™ Gel. A deep layer of Staycool gel actively draws heat away from your body, which means the cooling works with you all night rather than fading after an hour. It also moulds to your curves for pressure relief from head to toe.
- ActivFlex™ Spring Foam. This engineered foam combines the benefits of springs and foam, targeting tension relief while moulding to your body shape. In practice, it gives you contouring without the stuck-in-the-mattress feel some memory foams have.
- Pocket Springs. The core combines full-size, barrel-shaped pocket springs with fast-reacting mini comfort springs. Each spring moves independently, so your partner's tossing and turning is far less likely to reach your side.
Layer details from mattressnextday.co.uk product page, September 2026.
- 75cm each for two sharing: You each get 75cm of width, which means the cradling pillow top can do its moulding without either of you drifting into the other's space.
- Movement stays on their side: The 2,600 independent pocket springs already limit motion transfer, and the UK king's extra width puts more distance between you and a partner who gets up hours earlier.
- Length for taller sleepers: At 200cm long, the UK king is 10cm longer than the UK double, which means anyone approaching six foot stops sleeping with their feet at the very edge.
- Room for a bed-sharing pet: If the dog treats the bed as its own, the extra width means its usual sprawl costs you less of the cooling gel surface you paid for.
- A sensible fit for most master bedrooms: We suggest at least 2.7m x 2.9m of floor space, a demand most UK master bedrooms can meet, unlike the roomier ask of a UK super king.
This size suits you if...
You share the bed every night and a double has started to feel cramped, especially on a plush surface where you both settle into the pillow top. It also suits you if one of you is on a different schedule and you want their comings and goings to stay on their side, or if someone in the bed is nearing six foot and needs the 200cm length.
Consider another size if...
Your bedroom falls short of our suggested 2.7m x 2.9m minimum, or you sleep alone. In either case we'd recommend the UK double instead, which needs at least 2.6m x 2.8m and keeps the same feel.
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Is a UK king big enough for two people on the Sleepeezee ActivFlex Response 2600?
Comfortably, for most couples. You get 75cm of width each, which leaves room to spread out on the pillow top rather than sharing one dip in the middle. The independent pocket springs then keep each side moving separately, so a restless or early-rising partner is less likely to wake you.
Is the UK king worth it over the double for this mattress?
For couples, usually yes. The UK king is 15cm wider and 10cm longer than the UK double, and on a soft-topped mattress like this the extra width is felt every night, because you both settle into the surface rather than lying on top of it. Solo sleepers can save the space and take the UK double.
What size room do I need for the ActivFlex Response 2600 in a UK king?
We suggest a minimum of 2.7m x 2.9m, with around 3.2m x 3.2m feeling genuinely comfortable once wardrobes and bedside tables are in. New build master bedrooms often shrink once furniture arrives, so measure your walking space, and remember this guidance is ours rather than Sleepeezee's.
Is the UK king long enough for someone over six foot?
At 200cm, the UK king gives 10cm more length than the UK double, and for many taller sleepers that length is the real upgrade. Someone around six foot two still has clearance before their feet reach the edge, so the contouring foam layers support their whole body rather than stopping short.
Where can I compare prices on this mattress in a UK king?
Use the price table on this page, which is updated as retailers change their prices. Because the ActivFlex Response 2600 spans a wide range across its five sizes, checking the live UK king figure is more reliable than any number printed in an article.