>>902871context dude. If you are in alpine conditions, or subzero as the anon I was addressing is going to face, a synthetic puffy OVER your outer makes a lot of sense. Primaloft (apparently) retains 96% of it's insulating capability, and personally I'd rather take a bit of damp than stripping on and off when it's not necessary.
I am not of course saying if it's pishing down to put your puffy over the top, or even that if you intend to wear the two for a long period of time you'd put it over the top, but nevertheless it's water resistance is the strongest point of a synthetic layer.
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