The Quest Tour jersey is of moderate weight to keep my torso warm (along with a very light base tee) on a cool morning, but wicks moisture well enough for a sunny afternoon, too. It's also has a generous cut so that it's more forgiving of a torso like mine - not so form-fitting that I look like a strangulated grape - but it's not billowy, either. This is the first jersey in which I've felt 100% comfortable. I now have four of them.
I have several of these jerseys. They look good, the back pockets work well, and the large zipper allows for temperature control (within limits, of course). What I like best is the looser fit. If you like a tight fit, pick another jersey. But if you want a looser fit, these are great.
I ride in 90-100 degree heat in Texas and this jersey because of the loose fit and the fabric, has the best cooling properties I've ever owed! It also washes very well and keeps looking new. I liked it so well I bought another one (different color of course). It has great reflective features that can be seen by cars and other cyclist.