Comfort / Limit / Extreme

Comfort: This is the temperature the sleeping bag should ideally be used in to provide adequate warmth and comfort to the camper, and the best night's sleep.

Limit: The limit is the lower limit of temperature that the sleeping bag should be used in. The sleeping bag should not really be used in colder temperatures than the Limit Rating.

Extreme: The Extreme Rating, is the temperature that a person would "survive" the night in the sleeping bag, but not sleep or be in any comfort at all. The sleeping bag should only be used in this temperature as a last resort or emergency.