In reply to BusyLizzie:
> Perhaps there will come a day when I unwrap it, in a tight spot on a crag, only to have it disintegrate with age...
A few years ago I was descending the Benn with a few mates after doing tower ridge and we came across some underdressed walkers who were in a mess and awaiting rescue. My mate puffed his chest out and ever prepared, whipped out his emergency orange bivi bag that had obviously been in his sack since the seventies. As he took the tape off and shook it out into the wind it disintegrated into a thousand pieces and spread itself across the mountain side....sad to see the mountain littered but hilarious all the same.