Good mid layer pants - Arc'teryx Atom LT Pant - Men's

The pants fit a nice niche. I have been looking for something to wear under a hard shell at high altitudes in cold and windy environments. While above treeline on a cold day I brought these out and they easily fit over my base layer and provided much needed insulation that allowed a summit. That was the only time I got to use them, but I have brought them on my journeys every time as they pack down well and allow me not to take my heavy down pants. I would be hesitant to wear them as an outer layer as the outside fabric does not seem like it would hold up to rocks or tree branches. The fit is a little trim (which is what I want in a mid layer) and the easy of putting on and taking off is outstanding with the zippers.