I can't say I have ever slept really well in sleeping bags, as I tend to sleep on my side and also wriggle about like a crazy animal all night! Consequently I end up tying myself up in a bag. This is why I thought I would give quilts a go, plus the added bonus of being lighter. Being a vegan I will only consider synthetic, so wondered what the best option would be for winter use inside a bivvy bag? I plan to only use a bivvy and not bother with a tarp or tent. I am planning a hiking trip to the Scottish highlands in November, so it needs to be something that will cope with the cold. Also don't know what sort of size I would be looking at? I am about 5 foot 8 tall and 90kg.