In reply to David Kirsfelds:
Obviously we are all different but personally I would find the ME Xero 200 fine but with a few extras to top it up. I would add:
- Insulating jacket over the top of the sleeping bag rather than worn on the body ( can be zipped up to keep it secure / in place )
- Silk liner, change into fresh dry socks
- Do some sit ups when first inside the bag
- Put hot water into a secure bottle near the feet for a cosy start
- Eat fatty food such as cheese and have a hot drink before settling down to sleep
- Wear hat
- I tend to use a Z lite cut to shape which works for me, often using the rope underneath the feet end and rucksack for a pillow. Sometimes a short Therma Rest when I'm not on gravel.
- Ensure bivvy spot is out of the wind if possible. If breezy put lightweight hardshell zipped up over feet of bivvy bag.
Happy snoozing...