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After a hard day in the harness you really do look forward to a nights sleep, even if it is only for a few hours. The choice of sleeping bag is vast. But a couple of considerations are that down bags will loose some of their effectiveness if they get damp, or worse if they get wet cease to provide any warmth. Down is ok in places like Antarctica but if your pushing for the North Pole choose a synthetic one.

I always use a thin vapor barrier bag inside my sleeping bags to minimise the amount of moisture which could get into the bag. Some research suggests we loose 1 litre of fluid a night as it naturally leaves our bodies through sweat.

Your choice of sleeping mat is also important, especially if you are on a long journey. Have your supplier produce an extra thick mat and use a Thermarest style also - look after these as they can puncture and the valves can break in the extreme cold.




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