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Down jacket

Quilted, padded jacket

  • 3 min read
  • 2 chapters

Related on Lably

Through Down feather

Properties

Down is favored among hikers and backpackers because it can easily compress into a small size to fit in a backpack, and it has the highest warmth to weight ratio. The down's loft in the jacket is measured with the term "fill power" which represents the number of cubic inches one ounce fills. For example, one ounce of 700 fill-power down will fill 700 cubic inches. A jacket with larger fill power will compress better and have a lighter weight relative to the jacket's volume and warmth. Usually goose down is loftier than duck down. "Box construction" baffles are warmer than "sewn through" baffles.

In contrast, if water absorbs into the jacket's down material, the down looses its puffy loft, and loses its warmth until it dries again. Some down jackets will be durable water repellent (DWR) which indicates that it can withstand a light drizzle of water for about an hour before it soaks into the jacket. Some jackets use hydrophobic down (i.e., down coated with hydrophobic material) to delay the absorption of water into the jacket. If a jacket does not have hydrophobic down or DWR, those properties can be easily added at home with products. Also, some down jackets are labelled as "downproof" to indicate that it will leak down feather less than a typical down jacket.

Real down has better warmth to weight ratio and compressibility compared to synthetic, but synthetic down has better water resistance. They are both equally durable.

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