Sealy Advantage Memory Essential Mattress
Mattress
Sealy Advantage Memory Essential Mattress
Size
Firmness
Medium Firm
Construction
Depth (cm)
27
Layers
2
Layer Details
- Comfort Layer. A layer of MemorySense memory foam sits on top, which means it moulds to your body shape and eases pressure on your shoulders and hips. It gives you that gentle cradling feel memory foam is known for.
- Support System. Beneath the foam, PostureTech Core Support Springs do the structural work, keeping your spine aligned and adding responsiveness so you don't feel stuck when changing position. The springs also allow more airflow than a solid foam base.
Layer details from mattressonline.co.uk product page, September 2026.
- 75cm each, every night: Two people sharing get 75cm each, which means you can settle into the memory foam's cradle without lying in your partner's space.
- Width that softens spring movement: The PostureTech springs can transmit slightly more motion than all-foam builds, so the extra width of a UK king puts useful distance between you and a restless partner.
- Different schedules, less disturbance: If one of you gets up hours before the other, more room to slip out from means fewer 5am wake-ups for whoever stays put.
- 200cm for taller sleepers: The UK king runs 10cm longer than the UK double, so anyone approaching six foot keeps their feet on the MemorySense foam rather than the edge.
- Room for a bed-sharing dog: If the dog treats the bed as its own, 150cm of width means the medium firm surface still leaves both humans a fair share.
This size suits you if...
You share the bed every night and a UK double has started to feel cramped, especially if one of you is a light sleeper who notices spring movement. It also fits if either partner is approaching six foot and wants the extra 10cm of length, or if a pet routinely claims a corner and you'd rather add width than argue.
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 medium firm feel.
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Is the Sealy Advantage Memory Essential UK king big enough for a couple?
Yes, comfortably for most. At 150 x 200cm you get 75cm each for two people sharing, which is enough to enjoy the MemorySense foam's contouring without drifting into each other's space. If you both sprawl, or a dog joins you most nights, sizing up to the UK super king adds another 30cm of width.
What room size do I need for this mattress in a UK king?
We suggest at least 2.7m x 2.9m, which leaves room to walk round both sides and open drawers. In a new build master, measure once the wardrobes are in place, as these rooms often feel smaller than the floor plan suggests. If yours is tight, the UK double needs at least 2.6m x 2.8m.
Will the UK king reduce partner disturbance on this mattress?
It helps. The PostureTech springs can pass on a little more movement than an all-foam design, and one owner review across verified feedback mentioned motion transfer. Width is the practical answer: at 75cm each, an early riser can slip out with less chance of waking whoever stays asleep.
Is the UK king long enough for someone over six foot?
At 200cm, the UK king is 10cm longer than the UK double, so a sleeper just over six foot lies fully on the mattress rather than hanging off the end. If either of you is well past that mark, the UK super king is the same length, so the gain there is width, not extra length.
Where can I compare prices for this mattress in a UK king?
Prices for the Sealy Advantage Memory Essential in a UK king are shown live on this page and updated as retailers change them, so the figures you see reflect current pricing rather than a snapshot. It's worth checking back before you buy, as mattress pricing moves around often.