Sleepeezee ActivFlex Response 2600 Memory Small Double Mattress
The Sleepeezee ActivFlex Response 2600 is a medium-tension memory mattress that pairs 2,600 pocket springs with cooling gel and a pillow top, which means you get the contouring of foam without losing the responsive support of springs.
- Cooling gel draws heat away
- Minimises partner disturbance
- Medium feel suits most sleepers
£949
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Sleepeezee ActivFlex Response 2600 Memory Mattress
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Mattress details
Mattress
Sleepeezee ActivFlex Response 2600 Memory Mattress
Size
Firmness
Medium
Construction
Memory Foam
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.
Key benefits
- Real space for one: The UK small double is 30cm wider than the UK single, so a solo sleeper can roll, sprawl and change position without meeting the edge.
- Fits compact bedrooms: At 15cm narrower than the UK double, this size slots into box rooms, studios and loft conversions where a 4ft 6in frame would dominate.
- Cooling matters more in small rooms: Compact bedrooms warm up quickly, and the Staycool gel layer draws heat away from your body all night rather than trapping it.
- Copes with the occasional guest: The 2,600 pocket springs move independently, so two people sharing for a weekend stay feel less of each other's shifting than the width suggests.
- Easy to dress: Small double is a standard UK size at 4ft wide, so fitted sheets and frames are simple to find, paired with a standard double duvet.
This size suits you if...
You sleep alone and have outgrown a single but your room can't spare the floor space a double demands, you're furnishing a guest room or holiday let where couples stay occasionally rather than nightly, or you're downsizing and the bed has to fit the new room rather than the old one. The medium tension and pillow top suit a solo sleeper who likes a plush, cradled feel.
Consider another size if...
You share the bed every night, because 120cm between two adults gets tight over time. We'd recommend the UK double instead, which is 15cm wider and needs a room of at least 2.6m x 2.8m.
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FAQ's
Is a small double big enough for the ActivFlex Response 2600's pillow top to work for two?
For occasional sharing, yes. The pillow top cushions both sleepers and the independent pocket springs limit movement transfer. Every night is a different matter: at 120cm wide, two adults on a plush surface will tend to roll towards each other more than on a firmer, wider bed. Couples sleeping together nightly should look at the UK double.
What room size do I need for a UK small double?
We suggest allowing at least 2.4m x 2.8m. That leaves enough clearance to open the door, walk round the bed and change the sheets without a squeeze. If your room comfortably exceeds that, the UK double needs at least 2.6m x 2.8m and gives you 15cm more width for very little extra floor space.
Will the small double ActivFlex Response 2600 fit up narrow stairs?
This mattress arrives flat rather than rolled, and at 120 x 190cm it is a two-person carry. The small double is the easiest double-width size to manoeuvre, but if your route involves a tight loft staircase or sharp landing turn, measure the turning points before you order.
Is a small double a good size for a teenager's room?
Often, yes. A teenager who has outgrown a single gains 30cm of width without the room losing desk or wardrobe space to a full double. One caution with this particular mattress: the medium tension and plush pillow top suit sleepers who like some sink, so a teenager who prefers a firm, planted feel may find it soft.
What bedding fits the ActivFlex Response 2600 in a small double?
You need small double (4ft) fitted sheets, and because the mattress is 26cm deep with a pillow top, check the sheet's stated depth before buying so it grips the corners properly. A standard double duvet works fine on top, with a little overhang each side for a solo sleeper.