Bought in 2016. Not used in several years. Kept in storage sack, uncompressed in closet in smoke free home. No damage or bad odors.
Details:

Down Fill: 950, Down Treatment: DownTekâ„¢ Water-Repellent Down, Temperature: 10°F (-12°C), Length: Regular – 6′, Width: XWide – 64″, Inside Fabric Color: Black 10D, Outside Fabric Options: Forest 10D)

my weight using kitchen scale is 24.4 oz

I’m including the storage sack but not a stuff sack

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