Not all silk is one fibre. A field guide to mulberry, eri and muga — three moths, three temperaments, and which one belongs against skin at which hour.
We tend to speak of silk as if it were a single thing, the way we speak of gold. But silk is not a metal; it is the spun saliva of a moth, and the moth decides almost everything. Three of them matter to a woman who dresses with intention beneath her clothes: the mulberry moth, the eri and the muga. Each gives a thread with its own grain, its own light, and its own argument about how a garment should sit on skin.
Mulberry: the disciplined one
Bombyx mori is the silkworm of legend, and the only one fully domesticated — it can no longer survive without us. Fed an exclusive diet of mulberry leaf, it spins a single unbroken filament that can run over a kilometre long. Reeled together, those filaments make the smoothest, most uniform, most reflective silk in the world. This is the silk of the bias slip and the fluid camisole: long-stapled, even, obedient to the cut, and — the quality that matters most next to skin — almost frictionless. A mulberry charmeuse gusset or a mulberry-lined cup does not chafe, because there is no short fibre end standing up from the surface to catch.
Eri: the quiet cousin
Eri silk comes from the Samia ricini moth, raised on castor leaves across northeast India and the hills of mainland Southeast Asia. It is sometimes called peace silk, because the moth is allowed to leave its cocoon before the fibre is harvested. That single fact changes the thread entirely: once the moth chews its way out, the long filament is broken, so eri must be spun from short staple like wool or cotton. The result is matte rather than glossy, with a soft, woolly warmth and a faint thermal quality — it breathes in heat and insulates in cool. On the body, eri behaves less like satin and more like a very fine jersey: it holds rather than pours, which makes it the right ground for a soft-cup bralette or a knicker meant to be worn all day rather than for an hour.
“Eri taught us that lustre is not the same as luxury. A matte silk, cut well, can be the most expensive thing in the room precisely because it does not announce itself.”
The atelier
Muga: the gold one
Muga is the rarest of the three, produced only by Antheraea assamensis in the Brahmaputra valley of Assam. Its thread is naturally golden — not dyed, but born that colour — and it grows more lustrous, not less, with every wash. Cloth of muga can be handed down for a century and look richer at the end than at the beginning. It is a semi-wild silk, the moth feeding on aromatic som and soalu trees, and it cannot be farmed industrially. Scarcity is built into its biology, which is why it appears in this house as an edge, a binding, a narrow panel, and never as a whole garment.
Here is the way to hold the three of them in your hand and in your mind:
- Mulberry — long filament, high lustre, even and fluid, slippery against skin. The silk of the bias slip.
- Eri — broken filament spun like wool, matte and warm, with weight and a gentle tooth. The silk of the everyday piece worn from morning to night.
- Muga — semi-wild, naturally golden, improves with age and washing. The silk of the detail you keep.
Why the house uses all three
A drawer built on a single silk is a drawer with one voice. We reach for mulberry when a piece must move with the body and disappear under clothing — a bias slip, a camisole, the lining of a cup. We reach for eri when we want silk to behave almost like fine flannel: a soft-cup bralette that holds without a wire, a high-waisted knicker that stays where it is put through a working day. And we reserve muga for the pieces meant to be kept — a binding along a neckline, a narrow band at a hem, the one warm gold line in an otherwise ivory piece. The moth chooses the character; the atelier only chooses which character the hour requires.
If you remember nothing else, remember this: when a silk shines, ask what it is for. Lustre is mulberry doing what it does best, and it is exactly right beneath a fitted dress. But matte is not a lesser silk. Worn against the skin for fourteen hours, it is very often the more deliberate one.
