Flaxby Platinum Eclipse Mattress
Mattress
Flaxby Platinum Eclipse Mattress
Size
Firmness
Construction
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.
- Real space for one: At 120cm wide, it's 30cm wider than a UK single, which means a solo sleeper can stretch out fully on those calico pocket springs.
- Luxury that fits a compact room: Because it's 15cm narrower than a UK double, this size brings the Platinum Eclipse into loft conversions and smaller bedrooms a bigger frame would crowd.
- Firm support across the full surface: The 13,440 handsewn pocket springs respond to your shape wherever you settle, so the extra width over a single is genuinely usable, edge to edge.
- Natural fibres, cooler nights: Wool, cashmere, hemp and flax layers breathe well, which matters in the smaller rooms this size suits, where air can sit warm and still.
- Standard 4ft sizing: The UK small double is a standard UK size, so finding a frame and fitted sheets to match is straightforward.
This size suits you if...
You sleep alone most nights and have outgrown a UK single but your room can't spare the width of a full double, or you're furnishing a guest room or second bedroom in a holiday let where couples stay occasionally rather than nightly. It also suits a downsizer whose new bedroom simply won't take the bed the old one did, but who still wants natural materials and firm, handmade support.
Consider another size if...
You share the bed every night and want proper space for two on a firm surface. The UK double is 15cm wider at the same length; allow at least 2.6m x 2.8m and we'd recommend it instead.
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
Is a small double big enough for the Flaxby Platinum Eclipse to make sense?
Yes, if you sleep alone. The full spring count and natural fillings run across the whole 120cm width, so one person gets the complete firm, contouring feel with room to move. For nightly couples, the firmness means less rolling together, but the width is tight for two.
What room size do I need for the Flaxby Platinum Eclipse small double?
We suggest at least 2.4m x 2.8m. That leaves enough clearance to walk round the bed and open drawers or a door without squeezing past. In a box room or studio, measure carefully first: the 15cm saved against a UK double is often exactly what keeps the door swinging clear.
Can a couple share the Flaxby Platinum Eclipse in a UK small double?
For occasional nights, yes. The independent pocket springs limit movement transfer, so a guest room visit or the odd weekend together works well enough. Two adults sharing every night will find 120cm restrictive, and the UK double, 15cm wider at the same length, is the better long-term choice.
Is the small double a good size for a teenager?
It can be a sensible step up from a UK single: 30cm wider at the same length, so no extra floor space is lost front to back. The one caution is the feel. This is a firm mattress, and a lightweight side sleeper may find it a little unforgiving at the shoulders.
How does the small double compare with the UK king in this mattress?
The UK small double is 30cm narrower and 10cm shorter than the UK king. The king needs a room of at least 2.7m x 2.9m, so it suits couples with space to spare; the small double is the solo or compact-room option. Compare the retailers listed on this page for current prices in each size.