
Alpkit Wee Airic - Self inflating 3/4 length. This is small enough to fit inside my bivi bag and also quite robust so I'm not worried about punctures. Comfy to sleep on and relatively warm this would be my default choice but rolled up it is about 26cm x 10cm dia and it ends up on top of the front harness. This puts more weight on the front and more of an issue it is in the way of mounting my light even with an extender to lift it up. If I know I'll not be riding after dark then this is ok but otherwise it's a pain.
Multimat Superlite Air - Air mat, full length. This is too wide and thick to go inside the bivi bag so ends up underneath. This is fine if I know where I'm going to be sleeping will be grass but I'm too worried about punctures to use it in woodland or anywhere with stones etc. This is very comfy and packs up small enough to fit anywhere so inside the frame bag or seat pack.
Closed cell foam. This was tried as an experiment buy cutting down an old foam mat to what I thought would be the smallest I cold get away with so about 35cm wide x 90cm long. Being super-light I had this fixed to the outside of my rucksack which itself is only a small daysack. It was fine to carry and being csf I had no worries about punctures etc. and had in outside of the bivi bag. The only drawback it that it was just too small so my arms were off the sides and I didn't get a very good nights sleep. I might try again but I'd like to ditch the rucksack entirely so it would end up rolled up and fixed to the top of the front harness so the issue with the light would be back.
So, what I'm asking is what is your preferred mat choice and where on the bike do you carry it?
Also, has anyone used a Klymit Inertia X-Lite mat? This might be the answer as it would be small enough to fit inside my bivi bag so no worries about punctures and it also packs down to a very small size, but is it comfortable? I am usually a side sleeper but I do sometimes manage to sleep on my back which I guess may be a requirement to get the Klymit to work?
Sean