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In a word, no. There is no cold spot around that head hole they way it seals.

Doctari, if you can stay comfortable at 30F with NO UQ, you can probably roast at zero with a proper UQ like a JRB. I would have frozen to death, you are "Neo class".

I beg to differ, IME the Nest's velcro helps prevent CBS (Cold Butt Syndrome).

You surely need another Doctari. The No Sniveler serves better as a top quilt, IMO, especially if you have a Hennessy (then you need a Nest).