That's the conventional wisdom. Like I posted earlier, my dad's old circa 1960 Tempco Quilters down bag is still a good warm bag. It's patched, and the little cloth tabs around where you could snap in a hood or something are in some cases, completely worn through, but the loft is still pretty darn good.

Jerry Wigutou of Wiggys says that Lamelite really holds up well, but on the other hand there are a lot of posts to the contrary out on the 'net -- but there are also a lot of posts of extremely satisfied long term users of Wiggys bags. What's a poor boy to do?