In the same vein as prm, here are a couple of pics of various puffy and similar purpose jackets.
Kuiu 240 Peleton (L), Sitka Kelvin Lite (R)
Sitka Core Heavyweight (L), Patagonia R1 hoody (M), Kuiu 240 Peleton (L)
Sitka Traverse Cold Weather hoody (L), Sitka Kelvin Lite hoody (R)
All 4 together
Interestingly, the most windproof is the Kuiu 240 Peleton. It didn't occur to me to wear it as a mid layer until prm posted. It is about the same weight as the R1 and Core Heavyweight. I also did the "light test" to the KLH. You can't see specific light 'holes/beams' through the material but you can see the light illuminating the material from the opposite side of the light, especially as the stitching. It still breathes fairly well - you can blow air through it (my empirical windproof test).
The Sitka Traverse Cold weather hoody isn't a puffy but is deathly quiet, warm, and breathes. I don't think its as warm as the KLH but the exterior is quiet. I ended up with it kind of by accident and decided to keep it. Its worth a consideration as well.