In reply to MattCrees:
> It's something I've always liked to take out over the years when out and about by myself in the hills/mountains of the UK, but happy for any advice as I'm by no means an expert!
I doubt a kilo is going to make much difference for most of us over a day's hill walking but if you don't have a survival bag or a bothy bag I don't think a sleeping bag would be much use in an emergency. You need to be able to get out of rain/snow and wind primarily in difficult situation and a sleeping bag isn't very good at that, particularly not a down bag. If you, say, broke an ankle and had to sit out a night in bad weather waiting for the MRT to find you, I really don't think a sleeping bag would help you much unless the weather was perfect. You need and old school survival bag or, better, a small bothy bag. Add in a duvet jacket as well of some type and sitting on your rucksack you'd be in a better position to make it through the night. I'm just interested in what sort of situation you think the sleeping bag might help with - particularly if you don't have that other stuff (or a mat)?
But for 3 season camping a good 500 fill down bag like that Rab one would be great. You can probably find one of similar warmth a bit lighter, but they get more expensive as they do! Alpkit's version around that amount of fill would be worth considering too - everyone seems to love them!
Post edited at 21:56