Eric K.wrote a review of Castelli A Bloc Full-Zip Jersey - Men's on October 18, 2019
Familiarity: I've used it once or twice and have initial impressions
This is not your typical Castelli skin-tight fit jersey, which can be good or bad depending on what you want. In my regular Castelli size (L) the zipper area bunched up when riding, but did not flap in the wind. Quality of the material and zipper seem excellent, but the neck area is oddly large, possibly to help with ventilation. I expected the slight bagginess to have a negative impact at higher speeds and in the wind, but it did not appear to. I personally prefer a tighter form fit from both an aero and aesthetic standpoint, but as long as you know what you're getting in this it is a solid jersey.