Jonwrote a review of Outdoor Research Ferrosi Summit Hooded Softshell Jacket - Men's on December 3, 2017
Familiarity: I've put it through the wringer
40" chest, 32" waist
I bought this primarily as a cycling layer, but have used it casually a number of times as well. I bought this and the regular ferrosi, but ended up keeping this for a few reasons: trimmer fit, more durable fabric, and better chest pockets.
The fit is trim but not tight, and has enough room for an R1 or other similar fleeces. If you want to layer something heavier like a down puffy, sizing up might be smart. The fabric blocks a reasonable amount of wind, but nothing compared to a hardshell or windstopper. I wanted something super breathable because I do run hot, and I can always add another layer. It's been in the 30's and my go-to is this plus a 200wt wool shirt for the ride into work. My favorite part is the double chest pockets with the mesh backing. They're super helpful for venting when it warms up in the afternoon and really were the feature that made me keep this instead of the regular ferrosi.
Given the chance, I'd change two things: the hood and cuffs. I prefer an under-helmet hood for jackets like these because they don't catch nearly as much wind when they're down. I would also like simple non-velco cuffs like the regular version. Both those are minor details, so still an awesome jacket.