I would like to ask your opinion on sleeping bag liners, I specifically want to find out about the “warmth properties” of liners. I currently am looking at warmer 4season sleeping bags for when we go to the Drakensberg later in the year but the reasonably priced warm sleeping bags have a pack size of 30x25cm which is quite large IMO coming from my K-Way Zermatt 950 Eco.
I saw this liner on the First Ascent website and they say it adds up to 15° to your sleeping bag, so I was wondering if it would be worth it to buy a 6° comfort sleeping bag and just throw a liner in there for when I’m hiking in colder conditions. I’ve seen the liners are quite compact so it would definitely sort out the size problem and it would also allow me to use the sleeping bag in warmer summer conditions but I’m just concerned that the liner might not add the warmth that a 0° comfort sleeping bag would give.
If the liner is a bad idea, do you know anything about the Vaude Sioux 1000? I think for the price and the specs it looks like a great bag except for the size. There is also the First Ascent Amplify 1800 which has a much better pack size but it’s a South African made bag and I’ve read they aren’t too good?
Thanks for the help