Castelli Squadra Stretch Vest (Electric Lime/Dark Grey) (S)

This is a vest made of good quality materials, and it fits well, that is, it is not baggy and has some stretch material on the sides to make it fit closely but not tight. That is all fine. But it has a flaw that makes me wish I could talk to the designers. It flaps in the wind. Specifically, the rear of the arm holes catch the wind and it flaps and makes a noise like the old cards-in-the-spokes trick to make your kids bike sound like it has a motor. Really. It flaps very fast and very loud right in the ears. It is extremely annoying. I wanted a vest that does not flap in the wind. This is not the one. The only way it does not flap is if you open the zipper most of the way so wind can blow through the vest and out the arm holes. Of course that negates the vest altogether. I cannot recommend it for that reason. I would give it a 4 if it did have the flapping defect.

One other thing - the back of the vest is made of rain-resistant material, so it collects sweat. Maybe that is ok if you expect rain, but if I wear a vest I am no usually expecting rain, so mesh would be better.