My uncompahgre is from when they first started making them 6 or 7 years ago.
Do you find it to still be just as warm as when you got it? Was a bit skeptical when I saw the phrase "37.5 is forever" or something along those lines on the tag as I've read quite a bit about how fast synthetic insulation can start to degrade, too soon to have any insight myself though. Have you generally kept it stored compressed or hanging?