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The primary rating that should be on the bag is the pounds of insulation. It is a somewhat imperfect measure, but a summer bag might well be 2 or 2.5 pounds. A three-season might be 4, but that w...
Answer
The primary rating that should be on the bag is the pounds of insulation. It is a somewhat imperfect measure, but a summer bag might well be 2 or 2.5 pounds. A three-season might be 4, but that w...