i had it and returned it. it is NOT well designed, and not warm at all. i called ENO and they don't have a temp rating for it. talked to a tech and he didn't have a rating but guessed it would be between 20 and 40 degrees depending on how you warm you sleep. when i told him i was disappointed with their work on this, he told me that there are down products in the works, at around $300-400 dollars! i bought a Yeti.
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