I recently did a hike in temps ranging from 22 to 35. I found that I was relatively comfortable while layering a S/S t-shirt, a L/S t-shirt, and the Marmott DriClime wind shirt. I had with me the Patagonia Micropuff vest, but was too warm hiking with it on top of my first three layers.
I don't like the weight of the DriClime (14 oz's!), but it is incredibly versatile and functional.