Donny Roth wrote a review of Dynafit Ridge Shirt - Long Sleeve - Men's on May 9, 2012
Full Disclosure First: I am a Dynafit sponsored athlete. So I will only describe objective observations - both positive and negative - and will resist using judgmental words like, "better" or "best." But not many people have been in this stuff, so I will share my experiences.
Size: These run small. I am 5'8", 140 lbs, thin, but not pro cyclist thin. I would normally wear a small jersey. In this I wear a medium and it fits well. I would recommend buying a size up. The length is great for cycling, and hasn't bothered me a bit for running.
I have found this to be the most versatile shirt in the Dynafit collection. It is long sleeved, but I haven't over heated in it yet - even on a trip to the desert. In fact the sleeves offered great protection from the sun, and might have helped me stay more comfortable. It also has one, zippered pocket in the back, which has been perfect for short runs, where I don't want to carry a pack.
It is really lightweight, and obviously designed to breathe well and move moisture. It's so thin and silky, I was a little nervous about durability. After several rides in the piece, I can honesty say I am not worried about it. I have run through branches, and even augured in hard on my mountain bike and it held up fine. I put a hole in my knee warmers, but the jersey looks new.
For mountain biking and trail running, this is truly a great piece. It is thin enough to use in warm to hot weather, and the long sleeves offer a bit more protection. It's good looking and comfortable.