I have a sleeping bag from the 90s made with 3M Lite Loft Thinsulate. It was once a 0 degree bag, but it's probably good to only 40 degrees now. That's not a problem. I got my money's worth. I hadn't used it for a few years, so it was hanging in a closet. I pulled it out the other day and got in it to check for sizing for another bag. There's a somewhat strong chemical-like smell coming off it. No mold. No mildew. I washed and low-heat dried it after the last season of use. My assumption is the fibers, or bonds between the fibers, are breaking down and creating this odor. Like I say, this is a chemically smell. It's not bad enough to not use the bag, but 1) is it safe to continue using it? 2) am I right in the assumption that the Lite Loft is breaking down and creating this smell?
Has anyone read anything like or about this? Is this to be expected with older synthetic versions? Thanks for any information, experiences, or links that can help explain what I think is happening here.