Answer
Nov 29, 2023 - 04:29 PM
I appreciate your interest today in the big Agnes echo park 40 and 20° bags, determining comfort ratings can be difficult unless they are ISO-rated by the manufacture and labeled accordingly. Big Agnes does not publish they're testing methods for their bags, however, it is typically recognized that the comfort level is usually 10 to 15° higher than the published rating. We strongly recommend contacting the manufacturer in this case big Agnes for any information not found on their website.