I used the thermal pants for a trip into NYC from 9 a.m. to 10 p.m. and they kept me warm all day on a very chill 34 degree day.
The pants are very long and I am very short so they were up to my chest but it was fine with me... I just tucked my thermal shirt into them and kept cozy warm.  I was able to wear my jeans over them and not feel uncomfortable. Overall, I'm very satisfied with my purchase.