cjayflo wrote a review of Patagonia Triolet Pants - Men's on September 27, 2012
Familiarity: I've used it several times
Super burly face fabric, smooth interior to slide over base layers. Sheds water as expected, sitting on a wet lift chair is no issue. All seams appear to be well done and reinforcements where needed. Went flying over rough patches with no apparent harm to the pants. Full side zips work ok, two zippers that work in either direction. I love the built in belt for waist adjustments, and the fact that it is offset makes it even more comfortable.
The mediums fit me just fine in Height and Waist, but across the hips and front of thighs there was no way I would get a base layer on. I went up the large size and the length is a touch long, but the added room across the hips was perfect. I have the waist cinched down all the way most of the time, but it fits nicely. I primarily use these for skiing and its a tight tight fit around the boots. Forgot about the 2 pockets, very small, with how tight the pants are on me across the hips it makes it uncomfortable to put my keys in the pockets.
I highly recommend these for 3 season use if you are looking for a quiver of one pant that you can layer under.