Flaxby Platinum Solstice Mattress
The Flaxby Platinum Solstice is a firm, all-natural pocket sprung mattress at the very top end of the market.
- Firm feel, eases hips & shoulders
- Hemp & flax help regulate heat
- Free from FR chemicals & glue
£3,999
Get the lowest price we've found
The Flaxby Platinum Solstice's 19,170 springs include adaptive micro springs hand sewn into calico pockets, which means support is spread finely across your body rather than pushing back in broad zones. Above them sit layers of wool, cotton, mohair, silk, cashmere and alpaca, with hemp and flax to help regulate temperature. At 33cm deep it is a substantial mattress, and Flaxby backs it with a 10-year guarantee. This is a considered purchase for someone who wants natural materials and firm support, and is prepared to pay properly for both.
Mattress specifications
Firmness
Firm
Type
Pocket Spring
Depth (cm)
33
Number of Layers
3
Trial Period (nights)
Warranty (years)
10
Price Range
£3,999 to £6,399
Best Sleeping Position(s)
Back Sleeping
Stomach Sleeping
Certifications
Assessed from Flaxby's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
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 & 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.
Best suited for?
Warm sleepers
Hemp and flax layers help keep the mattress closer to a steady temperature, while wool and cotton wick moisture away, so heat builds up less overnight.
Back sleepers
Firm support from 19,170 pocket springs spreads weight finely across the body, which suits anyone who wants a level, well-held feel when lying on their back.
Allergy sufferers
A build free from FR chemicals and glue, made with natural fibres, suits anyone sensitive to off-gassing or who simply prefers a cleaner mattress.
Eco-conscious buyers
Wool, cotton, mohair, silk, cashmere, alpaca, hemp and flax make up the layers, giving a mattress built entirely from natural fibres.
Front sleepers
The firm feel and finely tuned micro springs keep the hips from sinking too far, which helps hold the body flatter when lying face down.
This is a firm mattress, so lightweight side sleepers may find it doesn't allow enough sink at the shoulder and hip. And at its starting price, 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.
Save on an earlier or ex-display model
Some retailers still sell the earlier version of this mattress, or ex-display and returned stock at a lower price. These are the sizes where it costs less than the current model's best price.
Flaxby Platinum Solstice Mattress
Select a comparison article below or choose to compare this mattress side by side with up to 2 other mattresses.
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
FAQ's
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. The mattress is 33cm deep in all sizes.
Couldn't find an answer to your question? Send us a message