Hypnos Orthos Support 6 Firm Mattress
Mattress
Hypnos Orthos Support 6 Firm Mattress
Size
Firmness
Firm
Construction
Depth (cm)
Layers
2
Layer Details
- Cotton comfort layers. Four layers of cotton sit at the top of the mattress. Cotton is breathable and wicks moisture, which means a cooler, drier feel through the night than synthetic fillings tend to give.
- ReActive 6-turn pocket springs. The support core uses Hypnos's ReActive 6-turn pocket springs, each one working independently. That means the mattress contours to your body and limits motion transfer across the bed.
Layer details from mattressman.co.uk product page, September 2026.
- A shared size that fits the room: At 135 x 190cm (4ft 6in x 6ft 3in), the UK double fits where a UK king would crowd the walls, which means space left for furniture.
- Independent springs matter more when sharing: The ReActive 6-turn pocket springs move individually, which means a partner turning over on their half of a UK double disturbs you less.
- Room for bedside tables both sides: Allow at least 2.6m x 2.8m and a UK double usually leaves space for a table on each side, something a bigger size can rule out.
- Firm support across the full width: The firm feel stays consistent edge to edge, so neither of you rolls towards the middle when sharing 67.5cm each of sleeping space.
- Cotton layers for two warm bodies: Two people sharing generate more heat than one, and the four breathable cotton layers wick moisture rather than trapping it like synthetic fillings can.
- Easy to dress on any budget: Double sheets and duvets are stocked everywhere, so replacing bedding for this size is cheap and simple.
This size suits you if...
You share the bed every night and want a firm mattress in a size that leaves your bedroom usable, or you're kitting out a guest room that needs to sleep visiting couples comfortably. It also suits a solo back or front sleeper who likes room to spread out, even with a dog or cat claiming a corner. Your room measures at least 2.6m x 2.8m.
Consider another size if...
You and your partner both like space and your room can take something bigger. The UK king is 15cm wider and 10cm longer; allow at least 2.7m x 2.9m and we'd recommend it for a noticeably roomier night.
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Is a UK double Hypnos Orthos Support 6 big enough for two adults?
Yes, with a caveat. The UK double gives 67.5cm each for two people sharing, which most couples find workable, and the independent pocket springs limit disturbance when one of you moves. If either of you is broad shouldered or a restless sleeper, the UK king's extra 15cm of width is a meaningful upgrade.
What room size do I need for the Orthos Support 6 in a UK double?
We suggest at least 2.6m x 2.8m, with around 3m x 3m being the comfortable norm. That allows bedside tables on both sides plus space to open wardrobe doors, which is exactly why the UK double remains the default in typical UK bedrooms where a UK king would dominate.
Will a firm mattress feel too solid on a UK double for a lighter partner?
Possibly. This is a genuinely firm mattress across its whole 135cm width, and a lightweight side sleeper may feel pressure at the shoulder and hip regardless of size. Since firmness doesn't change between sizes, choosing the UK double over another size won't soften it. Suitability comes down to sleeping position and body weight, on either half.
Is the UK double Orthos Support 6 hard to get upstairs?
Traditional pocket sprung mattresses like this don't roll or fold, so the full 135 x 190cm has to turn your stairs in one piece. In older terraces with tight turns or new builds with narrow landings, measure the route first. Hypnos doesn't publish a weight for this mattress, so check with the retailer before delivery day.
Should I buy the UK double or the UK small double for a smaller room?
The UK double is 15cm wider than the UK small double, and both are the same length. For a couple, that extra width is usually worth having on a firm mattress like this, where you lie on the surface rather than sink in. If your room is under 2.6m x 2.8m, the UK small double suits better; allow at least 2.4m x 2.8m for it.