Temperature Range: 2lbs filling cotton lined adult sleeping bag is comfort in 59F/15C and fits temperature range 50-77F/10 - 25C.3lbs filling sleeping bags is comfort in 50F/10C and fits temperature range 41-68F/5-20 C. 4lbs filling sleeping bags is comfort in 41F/5C, and fits temperature range in 32-59F/0 - 15C.
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