Simply RAB :)

Lightweight is first and foremost and probably most important.
I am just starting my adventure with the mountains - so I will not write something professional.
For me the most important thing was breathability and lightness, here I can say that you do not feel them on yourself in +30 degrees.
They met my requirements to the max.
I also use them on a daily basis, and so far they are performing at 10/10.
As for durability - time will tell.