nic wrote a review of Patagonia R1 Full-Zip Fleece Jacket - Men's on February 3, 2013
I've worked, climbed, and hiked in this fleece. Great for layering, kept me warm down to 20 degrees with a long sleeve base layer, the R1 and a shell. Any colder and it would be uncomfortable. I'm 5'10" 180 athletic build with long arms and a medium fit great. Breathability is good. As the zipper gets to the very top of the neck it tends to jam....the only downside so far.