I've been looking for good info on durability and longevity of Coreloft insulation (used in some Arc'teryx clothing). Not finding much, I contacted Arc'teryx directly and here was the response…FYI
"Hi Shawn,
Thank you for contacting Arc'teryx. The longevity of the Coreloft highly depend and use and storage. The worst thing for Coreloft is to compress it. I have seen Coreloft lasting as few as 3-4 months when used for driving a car for 1-2 hour daily. Just the compression between the back and the seat broke the fibres down in no time. The same can happen when Coreloft is stored in a tight compression sack for an extended period.
When used as a mid-layer and stored properly, it can last for many years. I have an Atom LT Hoody from 3 years ago and it sill looks brand new and haven't lost any of its loft."

