Warm Bedding
for Cold Sleepers
Silk-filled duvets in three weights, a four-season set, a linen throw.
01
Silk Filled Duvets
Grade 6A double cocoon fill
180, 320 and 500 g/m²
0.083 W/mK conductivity
The fill is Grade 6A double-cocoon mulberry silk, from cocoons spun by two silkworms together. Plumper and more resilient than standard silk floss, its long strands are layered by hand into a lattice that traps warm air, much as down does. The result is warmth with little weight, an even fill and no cold corners.
Here, silk's low thermal conductivity works in your favour. At 0.083 W/mK, it has the lowest figure of the fibres we use. On our hot sleeper page, the same comparison explains why we recommend linen in summer. It is one fact with two applications: silk releases heat more slowly, which helps a lofty silk fill retain warmth.
The key distinction is loft. Insulation comes from still air held within the fill, and that air needs depth. A 320 g/m² silk fill creates centimetres of airy loft; a woven silk sheet is barely a tenth of a millimetre thick and holds very little air. That is why silk sheets and pillowcases feature on our hot sleeper page, while this edit focuses on the warmth of silk fill.
Silk takes in moisture without quickly feeling wet, helping its warmth stay dry. If you feel cold at night, it is tempting to add heavier covers, then wake clammy at three in the morning because they held on to moisture as well as heat. Silk fill helps retain warmth while allowing moisture to escape.
Cared for properly, it serves 15 to 20 years.
02
The Extra Layer
Double layer French flax
European Flax® certified
Washable, softens with age
A double-layer French flax linen throw adds comfort before sleep and during the coldest hours after midnight. Lay it over the duvet for warmth you can add or ease back without fully waking. By day, it brings the made bed together.
Two layers of flax hold a pocket of still air between them, which is where the warmth actually lives. Linen also carries moisture away rather than holding it, so the extra layer adds heat without adding stuffiness. It machine washes, and it softens every time.
Four Warmth Options, One Silk Fill
Choose Your Warmth
Warmth is trapped air, not weight. Tog figures are a guide, not a lab rating: silk breathes more than down, so the same warmth feels less stuffy.
| Fill | Feels like | Choose it for |
|---|---|---|
| Summer, 180 g/m² | around 2 to 4 tog | warm rooms and hot sleeping partners |
| Mid-season, 320 g/m² | around 7 to 9 tog | most cold sleepers, spring and autumn nights |
| Winter, 500 g/m² | around 10 to 13 tog | cold rooms and the deep of winter |
| Four-season, 180 + 320 | two duvets, three warmth combinations | tie the two duvets together for winter |
Which One Is Yours
You feel the cold all year
The mid-season duvet at 320 g/m² is the weight most cold sleepers keep on the bed from September through May.
A cold room, or one set for the whole year
Four-season. The 180 and the 320 tie together for the deep of winter, then separate again in spring.
One of you feels cold; the other feels warm
Two single duvets in different weights on one bed, the Scandinavian way. Each side keeps its own warmth, and the linen throw keeps the bed looking like one.
You are already warm enough, just never cosy
Add the throw rather than the weight. It is the layer for the hour before sleep and the coldest stretch after midnight.
Grade 6A double cocoon mulberry silk · European Flax® certified linen · OEKO-TEX® certified. Free delivery over €89 and 14 day free returns.
Explore the Collections
For The Cold Sleeper
Warmth, Answered
Is a silk-filled duvet warm enough for winter?
Yes, in the right weight. Silk warms by trapping still air in a lattice of long fibres, the same principle as down. Our 500 g/m² winter fill sits around 10 to 13 tog, true winter territory. In an unheated room, add the linen throw over the top rather than jumping to a heavier fill you would overheat under by March.
What tog is a silk duvet?
Silk duvets are not lab rated in togs, so treat conversions as a guide: our summer 180 g/m² sits around 2 to 4 tog, the mid-season 320 around 7 to 9, and the winter 500 around 10 to 13. Because silk moves moisture out instead of sealing heat in, a silk duvet usually feels calmer than a down duvet carrying the same tog number.
Silk fill or down, which is warmer?
Gram for gram, down lofts higher and holds the most heat. If maximum warmth were the only question, down would win. What moves people over is warmth quality: silk drapes close to the body, so there are fewer cold gaps at the shoulders, and it breathes, so warmth does not tip into sweating. Most people who arrive here come from a down duvet that was simply too much.
Why does a light duvet still feel warm?
Warmth is trapped air, not weight. Double-cocoon silk floss is layered by hand into a springy lattice full of still air, so a 320 g/m² silk duvet warms like a much heavier blanket while resting on you lightly. If you love the feeling of weight itself, that is a real preference: choose the 500.
We sleep at different temperatures. Can one bed work?
Yes, the Scandinavian way: two single duvets in different weights, side by side on one bed. Each of you keeps your own microclimate and no one negotiates at 3am. A single throw across the foot of the bed brings the look back together in the morning.
How do I care for a silk-filled duvet?
Keep the duvet in a washable cover, air it about once a month and spot clean small marks. The sericin retained in the fill is associated with silk's natural resistance to dust mites. With proper care, a silk duvet can serve 15 to 20 years. Do not machine wash or tumble dry the silk fill. If it needs a thorough clean, consult a professional experienced in silk-filled bedding.