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[[Image:Israel 2 021 Sleeping Rucksack-Tourist.jpg|thumb|Somebody in a sleeping bag]] | [[Image:Israel 2 021 Sleeping Rucksack-Tourist.jpg|thumb|Somebody in a sleeping bag]] | ||
In Europe, the [[EN 13537]] [[standardization|standard]] normalizes the | In Europe, the [[EN 13537]] [[standardization|standard]] normalizes the temperatures at which a sleeping bag can be used. A test, relying on a heated [[mannequin]], provides four temperatures: | ||
* the '''upper limit''' is the highest temperature at which a 'standard' adult male is able to have a comfortable night's sleep without excess sweating. | * the '''upper limit''' is the highest temperature at which a 'standard' adult male is able to have a comfortable night's sleep without excess sweating. | ||
* the '''comfort rating''' is based on a 'standard' woman having a comfortable night's sleep. | * the '''comfort rating''' is based on a 'standard' woman having a comfortable night's sleep. |