Your Sleeping Bag and Comfort
Standard laboratory testing provides a rating range for each sleeping bag indicating two temperature ratings within that range specifically indicating:
1 ) The Comfort rating that indicates the temperature at which a cold sleeper might feel comfortable. This is the temperature rating brands use on women’s bags.
2 ) The Lower limit rating which is always lower than the comfort rating, indicates the temperature at which a warm sleeper might still feel comfortable. Bands use this is temperature rating on men’s bags.