Forrestwrote a review of Arc'teryx Cassiar Pant - Men's on February 18, 2019
Familiarity: I've used it several times
Fit: True to size
NEVER have I ever owned such an expensive piece of gear.
With that said, These are my favorite. They are like a softshell, lots of stretch and freedom of movement, super comfortable and not too baggy. They say in the description that there is a "brushed flannel backer for insulation" and I am here to say that is practically nonexistent. Not a negative though, I bought these because they are more of a shell and I can regulate temperature with my base layer weight.
I love these pants. I fluctuate between a 34 and 36 (dang winter weight) with a 31" inseam and I bought these in a 36 regular and they are fantastic with plenty of adjustability down to a 34 with the inner adjustment. The quality of these is amazing and I am looking forward to doing some touring in these as well, they are so very light and breathable that I am confident that I will not overheat.
I really like that these are a trim fit and fit a little more like my jeans which is what I was after. When riding in 25-35 degrees I found that a light base layer combined with these pants was perfect and unlike every other pair of pants I have owned, I have never felt a need to unzip the vents, they breathe fantastically. In sub 25-degree temps I reach for my medium weight base layer and they are great down to 15 degrees and if I am headed out in sub 15 then I would want a heavy base layer.
If touring or snowshoeing ( I have only snowshoed in these and appreciate the kick patches on the inside of the legs ) then the lighter base layer will work down into the low 20's for me ( I typically run hot ).
Yeah, these are expensive, but man oh man are they fantastic and I do not regret my decision.