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Sleeping Bags: Temperature

Comfort:
This rating is the lowest temperature at which a sleeper fully enclosed in their sleeping bag can have a comfortable night’s sleep in a relaxed position. This rating is based on a 25 year-old “standard female“ weighing 60kg and 1.60m tall. A man is able
to sleep comfortably at a somewhat lower temperature.

Limit:
This rating is the lowest temperature at which a sleeper fully enclosed in their sleeping bag can expect to have a comfortable night’s sleep in a fetal or tightly rolled-up position. This body position must be taken in order minimize the amount of
body surface area emitting heat. This rating is based on a 25 year-old “standard male”, weighing 70kg and 1.73m tall. This is a lower limit; a woman may already be at risk for hypothermia at this temperature.

Extreme:
At this temperature, the sleeping bag offers protection from freezing, however there is risk of hypothermia. It is assumed that a „standard female“ in a tightly rolled-up position can withstand the cold for 6 hours.

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