Rob Warewrote a review of Castelli Gabba 2 Jersey - Men's on November 2, 2016
Familiarity: I've put it through the wringer
Posting another review to update on a second full year of Gabba ownership. My experience with the long-sleeve Gabba is that it's a winter shell. Yesterday, I wore it in the low-40s with wind and light rain wearing nothing but a summer-weight baselayer underneath. I was chilly at first, but warmed up after 10 minutes. In the mid- to low-30s, I wear it with a long-sleeve merino baselayer. Any additional insulation and I end up sweaty and overheating once I've warmed up.
Disclaimer: I do tend to run hot, so your experience may vary, but the beauty of the Gabba is it lets you tailor your insulation as appropriate. I sized up to XXL for just that reason. An XL would give me a nicely tailored race fit, but I wanted the layering versatility and longer sleeves. (I'm a 36in sleeve, so eliminating that cuff/glove gap is tricky. The XXL lets me pull the sleeve cuff over my glove's cuff.)