SleepSoul Space 4000 Pocket Orthopaedic Gel Mattress
Mattress
SleepSoul Space 4000 Pocket Orthopaedic Gel Mattress
Size
Firmness
Firm
Construction
Depth (cm)
38
Layers
7
Layer Details
- Tencel knitted cover. A soft knitted Tencel cover with antibacterial properties, which wicks away moisture to keep the sleep surface dry and cool. A sensible starting point if you tend to sleep warm.
- Microquilted layer. A traditionally microquilted layer that adds a touch of surface comfort. It gives the top of the mattress a gently cushioned, finished feel.
- Pillow top. An extra comfort layer for a more luxurious feel. This softens the first impression of what is otherwise a firm mattress.
- Gel Foam. A cool gel foam layer that allows greater airflow and reduces heat and moisture build-up compared with traditional memory foam. In practice, that means less of the clammy warmth some foam mattresses are known for.
- Foam comfort layer. A foam layer that helps distribute your weight evenly, which means a more balanced surface with fewer pressure points.
- Pocket springs. 2,000 full-size pocket springs made from durable steel, each individually cased in a cloth pocket. They react independently to movement, so support goes where your body needs it most.
- Mini pocket springs. A further 2,000 individually cased mini pocket springs providing added comfort and soothing pressure relief. They also help decrease motion transfer, so a partner's movements are less likely to disturb you.
Layer details from mattressonline.co.uk product page, September 2026.
- A footprint most rooms can take: We suggest a room of at least 2.6m x 2.8m, so a UK double usually leaves space for a wardrobe and drawers in a second bedroom or first flat.
- Less disturbance on a shared width: Each sleeper gets 67.5cm on a UK double, and the 2,000 mini pocket springs help reduce motion transfer, so a partner turning over is less likely to wake you.
- Firm support for two different bodies: The full-size pocket springs respond individually, which means a heavier and a lighter partner each get support where they press down rather than rolling towards each other.
- Room for bedside tables: At 4ft 6in wide, a UK double often leaves space for a bedside table on each side, which a UK king can squeeze out of a smaller room.
- Easy to dress: Double sheets and duvets are sold almost everywhere, so kitting out this size costs less effort than hunting for larger bedding.
This size suits you if...
You share the bed with a partner in a bedroom of typical UK proportions, you want firm, orthopaedic-style support without the bed crowding out your furniture, or you're furnishing a guest room for visiting couples who mostly sleep on their backs or fronts.
Consider another size if...
You and your partner both sprawl, or one of you is tall and wants more length. We'd recommend the UK king instead, provided your room is at least 2.7m x 2.9m.
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How much space does each person get on the SleepSoul Space 4000 in a UK double?
A UK double gives 67.5cm each for two people sharing. That is 7.5cm less each than the UK king, which gives 75cm. The mini pocket springs help limit how much a partner's movement travels across the mattress, which makes the narrower personal space easier to live with.
Will the SleepSoul Space 4000 UK double fit in a small bedroom?
We suggest a room of at least 2.6m x 2.8m for a UK double, with around 3m x 3m being the comfortable norm. If your room is tighter, the UK small double needs at least 2.4m x 2.8m, although this mattress is not made in that size.
SleepSoul Space 4000 double or king: which should a couple choose?
The UK double is 15cm narrower and 10cm shorter than the UK king. A UK king gives 75cm each against 67.5cm each on the UK double, but we suggest at least 2.7m x 2.9m for the UK king. If your room clears that comfortably, the extra space is useful; if not, the UK double keeps the room usable.
What are the SleepSoul Space 4000 UK double dimensions in feet?
The UK double measures 4ft 6in x 6ft 3in, or 135 x 190cm. It is the same length as a UK single and UK small double. The UK king and UK super king are both 10cm longer, which matters if either of you is tall.
Is the SleepSoul Space 4000 in a UK double a good pick for a guest room?
A UK double suits a guest room well because it takes two visitors without dominating the space. The catch is the firm feel: guests who sleep on their backs or fronts should be comfortable, although lightweight side sleepers may find it a little too firm, even with the pillow top.