Choosing a Mattress for Two People

Sharing a bed creates four problems a single sleeper never has: one of you feels the other move, the middle sags before the sides, the heavier person sinks further, and you disagree about firmness. Each has a different answer, and only one of them is solved by spending more.

1. Feeling every time they turn over

This is the one pocket springs exist for. Each spring is sewn into its own fabric pocket and compresses independently of its neighbours, so movement does not carry across the bed. An open-coil unit, where the coils are wired together, moves as one surface — which is exactly why it is cheaper.

Spring count helps up to a point and then stops. Past roughly 1,500 in a double the springs have to be thinner to fit, so each does less; a 1,000-spring mattress with a good comfort layer beats a 3,000-spring one with a thin one. Our MicroPocket puts 1,600 small springs above the main unit, which follows two bodies more closely than foam of the same depth.

2. The middle going before the sides

On a shared bed nobody sleeps in the middle, so the two sides compress and the ridge in the centre stays high. It is normal, it is not a fault, and rotating the mattress head to foot twice a year is what slows it down.

What is not normal is the edge collapsing. If you slide off getting in, the perimeter springs have failed and the mattress is finished.

3. A big weight difference

A firmness rating assumes an average build. If one of you is 60 kg and the other 100 kg, the same mattress is genuinely a different mattress to each of you — the heavier person compresses through the comfort layer and feels the support core, the lighter one never reaches it.

Options, honestly ranked:

• Two linked singles. Two 90 × 200 mattresses on one base, each to its own firmness. This is the only answer that actually solves the problem rather than compromising on it. It is what hotels do.
• A deeper comfort layer. More centimetres above the support core means the lighter sleeper gets contour and the heavier one still finds support. Pillow-top builds do this.
• Split the difference and add a topper on one side. Cheap, works better than it sounds, looks untidy.

If the combined weight is over about 160 kg, the support core is the thing to buy, not the surface — see the Premium XXL.

4. You want different firmness

There is no mattress that is soft on one side and firm on the other in a single-core build — anyone selling you that is selling you a compromise with a label on it. Real answers:

• Zip and link. Two singles, two firmnesses, one bed. Needs a zip-and-link base and a topper across the join if you dislike feeling the seam.
• A reversible core. Our FlexiComfort flips between about 4 and 7. It does not solve two people at once, but it settles the argument about what to buy next.
• Meet at 6. A medium suits most people imperfectly and equally. Unromantic, and usually right.

Size is the cheapest upgrade

Two adults on a UK Double have 67.5 cm each — narrower than a cot bed is long. Moving to a King gives each of you 75 cm and to a Super king, 90 cm. If the room takes it, more width does more for a shared bed than any specification change.

See the UK size guide, and remember that King and Super king are 200 cm long where a Double is 190 — the frame has to change too.

Common questions

Does memory foam stop motion transfer?

It absorbs it well, and it is the reason all-foam beds feel still. The trade-off is heat and the effort of turning over.

Do we need a 3,000-spring mattress?

No. See above — past about 1,500 in a double you are buying a number.

Is a topper enough to fix a bed we already argue about?

It can soften a too-firm mattress for one side. It cannot firm up a too-soft one for the other.