Exped are soooo comfortable, better than many conventional beds. I have the 9cm thick Downmat (9LW) which is extra wide so you are less likely to roll off in the night, see Sleeping Mats - Traveldri Plus
Most of your heat loss is to the ground so a down-insulated mat really helps. I end up not needing the warmth of a sleeping bag beneath me, so I open it up and use it more as a duvet.
Exped do a lightweight range as well but I'd steer clear as they are not so hard wearing, the glue on the baffles between the tubes can fail.
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"For sheer delight there is nothing like altitude; it gives one the thrill of adventure
and enlarges the world in which you live," Irving Mather (1892-1966)
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