Ecovasa — Fueling change with nature

Materials — Milkweed

Milkweed fiber

Nature's hollow fiber — featherlight, warm and water-repellent, grown on dry land where little else will.

Real Calotropis procera seed pod opening to reveal silky white seed floss

Photo: Victor Korniyenko / Wikimedia Commons, CC BY-SA 3.0.

In short

Milkweed fiber comes from drought-hardy Calotropis and Asclepias plants. Its seed floss is a hollow, ultra-light fiber with insulation comparable to down, and its stems yield a strong bast fiber. It grows without irrigation on marginal land, making it a low-impact source for vegan fill, acoustic panels, oil absorbents and biocomposites.

Two fibers from one hardy plant

Known in India as Aak or Madar, Calotropis grows wild across arid and semi-arid regions. Its pods split open to release silky floss attached to seeds, while the stem bark holds long, strong bast fibers. Collecting both could create new opportunities for rural communities as collection develops.

How it compares

Indicative comparison of fill materials
PropertyMilkweed flossGoose downPolyester fill
SourcePlant, arid landAnimalPetroleum
Fiber structureHollow tubeClusterSolid or hollow synthetic
Water behaviourNaturally repellentLoses loft when wetRepellent
Cruelty-freeYesNoYes
BiodegradableYesYesNo

Sourcing with farmers

We are building milkweed collection with farmers and FPOs in Rajasthan, Gujarat, Haryana and central India. Join our farmer network.

Frequently asked questions

What is milkweed fiber?
Milkweed fiber comes from plants of the Calotropis (Aak / Madar) and Asclepias families. The seed pods hold a silky, hollow floss, and the stems carry a strong bast fiber. Both can be processed into natural materials.
Why is milkweed floss so warm and light?
Each floss fiber is a hollow tube — most of its volume is trapped air. That makes it one of the lightest natural fibers and gives it insulation comparable to down.
Does milkweed need irrigation or fertiliser?
No. Calotropis thrives on dry, degraded and marginal land in Rajasthan, Gujarat, Haryana and central India without irrigation, fertiliser or pesticides, so it does not compete with food crops.
What is milkweed fiber used for?
Vegan thermal fill for jackets and bedding, acoustic insulation panels, oil-absorbent mats (the fiber naturally repels water and attracts oil), blended yarns and lightweight biocomposites.
Can milkweed floss be spun on its own?
Floss fibers are short and smooth, so they are usually blended with cotton, banana or other fibers for yarn. As loose fill or non-woven batting, they are used pure.
Is milkweed fiber biodegradable?
Yes. It is a plant cellulose fiber with a natural wax coating and fully biodegrades at end of life, unlike polyester fill.
Can Ecovasa supply milkweed fiber?
Ecovasa is building a milkweed supply network with farmers and FPOs in arid regions. Contact us to discuss trial quantities, specifications and future capacity.
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