Took the Trasparente on the first ride today. Temp was 43 degrees. I was wearing a short sleeve jersey under this jersey. I was nice and toasty and I could not believe how warm this jersey is. The chest area is completely wind proof but there is a little bit of wind that gets in from the sleeves. I did like this on the uphill parts since it allowed for some cooling.
The jersey appears to be good quality and there are a lot of details worked in. The back is nice and long. Front pocket fits an iPhone.
I am 6 feet tall and 158 lbs and I am wearing a size Large. It is not skin tight but fairly close in some parts. With the other shirt underneath, I like the fit.
UPDATE: I have used this numerous times now and it has become my go-to jersey when it's too cold for a short sleeve jersey. From the 30's all the way to the 50's, this jersey is very comfortable. If it gets too hot, just unzip the front. I have also washed the jersey several times and it is holding up great.