I got this jacket a few weeks ago for running even though I was a bit skeptical. I was afraid it might be more of a fashion piece than a functional running jacket. I have worn this for every run since and found it lightweight, comfortable and breathable. I am running 40+km a week. I have not needed to take it off during run as it is nice and light. I was afraid this might need to be washed very often however, I have not needed to wash it yet as it dries really well and I have not found a smell of sweat yet. If I could suggest improvements it would be that this would be in brighter colours for the dark evenings