Flaxby Platinum Eclipse Mattress
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Mattress
Flaxby Platinum Eclipse Mattress
Size
Firmness
Firm
Construction
Foam
Pocket Spring
Wool
Memory Foam
Natural
Depth (cm)
35
Layers
4
Layer Details
Comfort layers
Naturally soft layers of wool, cotton, mohair, silk, cashmere and alpaca sit at the top. These fibres breathe well and wick moisture, which means a surface that feels soft against you without trapping heat.
Temperature-regulating layers
Beneath the comfort fillings sit naturally temperature-regulating layers of hemp and flax. These help keep the mattress closer to a steady temperature through the night, a genuine plus if you run hot.
Pocket springs
The core is over 13,000 handsewn calico pocket springs. Each spring moves independently, which means support that follows your shape and less disturbance when a partner shifts position.
Micro springs
Two layers of high density micro springs add extra contouring support above the main unit. In practice this softens the transition between the firm spring core and the natural fillings, so the surface adapts more precisely to shoulders and hips.
Layer details from featherandblack.com product page, September 2026.
- Fits compact rooms: At 90cm wide it needs only 2.1m x 2.8m of floor space by our guidance, so a loft conversion or box room can take it comfortably.
- Firm support for one: The 13,440 calico pocket springs deliver firm, shape-following support, which a solo back or front sleeper feels as steady alignment right to the edges.
- Natural fibres in a guest bed: Wool, cotton, mohair, silk, cashmere and alpaca breathe well, so guests get a surface that stays comfortable whatever the season.
- Cheap, easy bedding: Standard single sheets and a 135 x 200cm duvet fit, and single bedding is the most widely stocked of any size.
- Handles temperature swings: Hemp and flax layers regulate heat naturally, useful in a small room that warms up quickly on summer nights.
This size suits you if...
You're a solo adult sleeper who wants firm support and natural materials in a room where a bigger bed simply won't go, you're furnishing a spare room that doubles as an office and want guests to sleep as well as you do, or you're buying long term for a teenager who runs warm and needs proper spinal support.
Consider another size if...
You share the bed, or you're a solo sleeper who likes to spread out and has the floor space. We'd recommend the Flaxby Platinum Eclipse in a UK double instead, which is 45cm wider than the UK single; allow at least 2.6m x 2.8m for it.
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How big is the Flaxby Platinum Eclipse UK single?
It measures 90 x 190cm, which is 3ft x 6ft 3in, the standard UK one-person size. Bear in mind it's also 35cm deep, noticeably taller than most singles, so check your fitted sheets are deep enough and think about the finished bed height on your frame.
Will the Flaxby Platinum Eclipse UK single fit a bunk or mid sleeper?
The footprint fits, but the depth is the problem. At 35cm this mattress is far deeper than raised frames are designed for, which can leave the sleeper sitting above the guard rail. For bunks and cabin beds a shallower mattress is the safer choice; check the frame's maximum mattress depth first.
What room size do I need for a UK single Flaxby Platinum Eclipse?
We suggest allowing at least 2.1m x 2.8m of floor space, which leaves room to walk round and open drawers. That makes the UK single a realistic fit for box rooms, loft conversions with a narrow usable strip under the slope, and spare rooms that also hold a desk.
Is the Flaxby Platinum Eclipse single a good choice for a child's room?
It fits the room, but think twice. The mattress is firm, and lighter bodies may find it unyielding around the shoulders and hips. It's also a significant spend for a bed a child may outgrow in feel before they outgrow it in size. For a heavier teenager who sleeps on their back or front, it makes more sense.
Where can I compare prices for the Flaxby Platinum Eclipse in a single?
Use the live price table on this page. The prices shown here are updated as retailers change them, so it's a more reliable picture than any figure written into the text. Availability of the UK single can differ from the larger sizes, so check the size selected before you click through.