Nice jacket, with thin technical fabric that is soft and stretches. I haven't ridden it yet but it feels like it will block the wind and light rain very well. Some have warned you need to size up twice from your normal jersey size due to the snug fit in the arms, chest, and shoulders(especially if you intend to wear a thermal base layer).
I bought an XL, whereas the sizing from Castelli indicated a large might be right(40 chest is between L and XL). The XL fits me with my Nike baselayers, however, it is a very snug, race fit. All the other dimensions for a Large fit me fine, except I thought the neck might be a little loose.
Since I plan to use the jacket more for group rides and training rides, I'm considering going with the 2XL instead of XL to give me more room for layering, and a less aggressive fit.
These are my measurements
Chest - 40
Waist - 32.5
Hip - 35.5
Neck 15.5
Biceps - 11.5 - 12.5
Height - 5' 11
Weight - 160 lbs
I was expecting a cool weather jersey based on the description, in the nice looking steel blue with red trim. When I opened it I thought BTD sent me the wrong item, but the labels said it's what I ordered. Bummer. First, it's not blue, not even the slightest hint of blue, rather it's slate gray, or maybe light charcoal, with orange trim. Then the second problem for me is that it's a jacket. I already have the Alpha RoS jacket, which I love and has a wide temperature range, and this is just a lighter jacket that I don't need. I wanted a jersey that's actually a jersey, soft & stretchy like a jersey. But no, this is more stiff fabric, definitely a jacket, not gonna work as a jersey.
So if I wanted a gray with orange trim lightweight jacket, the Perfetto RoS would be fine and I'm sure I'd like it. True to Castelli, it's about as form-fitting as a jacket gets. But since that's not what I ordered, I sent it back. The problem is more with the description than with the product.
This is a very nice garment. The look is very good and the feel is nice. It keeps you warm. The one big concern for me is the sizing. This must be a Castelli brand issue. Their sizing definitely does not fit the description. I am a 44 chest which should be an extra large. But for this jersey I would need like a double extra large to be comfortable. Castelli XL is like a medium so definitely go a size larger when ordering.