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Gear Question
What does 580 Fill down mean? What kind of feathers are insi...
By kady2397487
Ranked #1536 - Men's Down Jackets
September 3, 2008
What does 580 Fill down mean? What kind of feathers are inside?
View Details: Spyder Surge Down Jacket - Men's
By marximus2102833
Ranked #1470 - Men's Down Jackets
September 3, 2008
The fill number indicates the density of the down and feathers inside the jacket or vest. The number dictates that an ounce of that density down will expand to fill 580 cubic inches. Therefore, the higher the number, the denser the down, the warmer you stay. The feathers are most likely goose, and there will be far more down than feathers in a jacket of this type.
Helpful Votes: 0 Yes | 0 No
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