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What is the "down" in a down jacket?

“Down” is the hair that grows only around the chest of water birds.
It is a rare natural material that only makes up about 8% of a waterfowl's body, and is not found in birds that live on land.

Waterfowl are broadly divided into geese and ducks.
Down is made up of thin, soft branches that look like seedlings that grow in a radial pattern like the cotton strands of a dandelion, and this shape is the key to its lightweight yet efficient ability to trap air.

All ALLIED down is sourced from contract farms that ensure a healthy breeding environment and chemical controls for all waterfowl in the supply chain.
Certifying it as the most sustainable down on the planet, all ALLIED down meets strict animal welfare regulations set by various third-party organizations.