Flaxby Platinum Solstice Mattress
Mattress
Flaxby Platinum Solstice Mattress
Size
Firmness
Construction
Pocket Spring
Wool
Natural
Depth (cm)
33
Layers
3
Layer Details
- Top layers. Naturally soft layers of wool, cotton, mohair, silk, cashmere and alpaca sit at the surface. These fibres give a plush initial feel while wicking moisture away as you sleep.
- Temperature-regulating layers. Beneath the comfort fibres are naturally temperature-regulating layers of hemp and flax. They help keep the mattress closer to a steady temperature through the night.
- Springs. The support core holds 19,170 pocket springs with adaptive, pressure-relieving micro springs, hand sewn into calico pockets. The micro springs respond to smaller contours, which means pressure points like hips and shoulders get more precise support.
Layer details from featherandblack.com product page, September 2026.
- The classic shared size: At 135 x 190cm, or 4ft 6in x 6ft 3in, the UK double is the long-established size for two, which means it fits rooms a UK king would dominate.
- Room for bedside tables: In a room of at least 2.6m x 2.8m, our suggested minimum, the UK double usually leaves space for a table on each side of the bed.
- Firm support across the full width: The 19,170 springs with micro springs hand sewn into calico pockets mean each of you gets finely spread support rather than rolling towards the middle.
- Natural temperature control for two: Two bodies raise the temperature under one duvet, and the hemp and flax layers help keep the surface steadier through the night.
- Easy to dress: Standard double sheets and duvets are sold everywhere, although at 33cm deep this mattress needs deep fitted sheets, so check yours before it arrives.
This size suits you if...
You share the bed every night and your bedroom is a typical UK size, where a UK king would leave little walking room. Or you sleep alone and want space to spread out, perhaps with a dog or cat claiming a corner, and you value firm natural support enough to pay properly for it. Allow at least 2.6m x 2.8m of floor space.
Consider another size if...
You and your partner both like room to stretch, and your bedroom measures at least 2.7m x 2.9m. In that case we'd recommend the UK king instead, which is 15cm wider and 10cm longer than the UK double.
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Is the Flaxby Platinum Solstice in a UK double big enough for a couple?
Yes, though it gives each of you 67.5cm of width when two people share, which is comfortable rather than generous. The upside is that the pocket springs respond to each sleeper separately, so you feel less of your partner's movement. If you both sprawl, the UK king offers more space, provided your room can take it.
What room size do I need for the Flaxby Platinum Solstice in a UK double?
We suggest at least 2.6m x 2.8m, with around 3m x 3m the comfortable norm. That smaller figure still lets you open drawers and walk around the bed, and in most rooms it leaves space for bedside tables on both sides. Measure with your wardrobe and drawers marked out before you commit.
Should I buy the Platinum Solstice in a UK double or a UK king?
It depends on your room and your budget. The UK double suits most UK bedrooms and costs less, which matters at this level of spend. The UK king is 15cm wider and 10cm longer, better for couples who want space, but we'd only suggest it if your room measures at least 2.7m x 2.9m.
Will the UK double Flaxby Platinum Solstice get up a narrow staircase?
At 135 x 190cm and 33cm deep, this is a substantial mattress, and natural fibre builds cannot be rolled or squashed the way foam can. Measure the turn on your stairs and the landing before ordering, particularly in older terraced houses or new builds with tight landings, and check the retailer's access requirements.
Is a UK double Platinum Solstice a sensible choice for one person?
Yes, if you like room to spread out. Sleeping alone you get the full 135cm of width, and the firm, finely tuned spring support holds up well wherever you settle. It is a lot of money for a solo bed, but if natural materials matter to you the double is the practical solo size.