Firmness
Type
Pocket Spring
Depth (cm)
33
Number of Layers
3
Trial Period (nights)
Warranty (years)
10
Price Range
£4,999 to £7,999
Best Sleeping Position(s)
Certifications
Assessed from Flaxby's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
Choose the Platinum Solstice if you want firm support built entirely from natural fibres. The hemp and flax layers regulate temperature naturally, which means less of the heat build-up that synthetic foams can cause, so hot sleepers are well served. The 19,170 springs with pressure-relieving micro springs give a responsive, finely tuned feel rather than a rigid one. It is also free from FR chemicals and glue, worth knowing if you are sensitive to off-gassing or simply prefer a cleaner build. Yes, the price is high, but the materials list reads like a luxury tailor's: Yorkshire wool, silk, cashmere, alpaca. Free delivery on all orders and a 10-year guarantee soften the outlay slightly.
Key Features & what's inside
- 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.
Who's it NOT for?
This is a firm mattress, so lightweight side sleepers may find it doesn't allow enough sink at the shoulder and hip. And with prices from £4,999, it is out of reach for many budgets: if you simply want good firm support, you can spend far less. It is also 33cm deep, so check your fitted sheets will stretch.
Flaxby Platinum Solstice Mattress
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How firm is the Flaxby Platinum Solstice mattress?
Flaxby describes it as firm. That suits back and front sleepers, and heavier sleepers generally, although lighter side sleepers may find it a little too unyielding at the shoulder and hip.
What is the Flaxby Platinum Solstice made of?
It is built entirely from natural materials: responsibly sourced Yorkshire wool, cotton, mohair, silk, cashmere and alpaca in the top layers, hemp and flax beneath for temperature regulation, and 19,170 pocket springs hand sewn into calico pockets. It is free from FR chemicals and glue.
Is the Flaxby Platinum Solstice good for hot sleepers?
It should be. The hemp and flax layers are naturally temperature-regulating, and the wool, silk and other natural fibres in the top layers wick moisture, so it avoids the heat retention associated with synthetic foam mattresses.
Does the Flaxby Platinum Solstice come with a guarantee?
Yes, Flaxby lists a 10-year guarantee on this mattress, along with free delivery on all orders.
What sizes does the Flaxby Platinum Solstice come in?
It is available in UK Single, Small Double, Double, King and Super King. Prices run from £4,999 to £7,999 depending on the size you choose, and the mattress is 33cm deep in all sizes.
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