I went on a long dayhike yesterday and found that I need more insulation on my bottom half. The temps started out around 31 degrees and went down to around 21 by 5pm. This is before wind chill. I started out with boxers and soft shell fleece pants. A couple hours in I added my rain pants. I had another layer in my long underwear bottoms that I could have added, but I do not think that they would have made a difference. I think I would have gotten cold enough adding that layer that it would have off set any added warmth it would have. I do not want to take the soft shell pants on my hike, they weigh in at over a pound. I already am planning on long underwear bottoms and rain paints. I was cold enough that I do not think that fleece shorts would have made a difference. My butt and tops of my thighs were the only parts of me that were cold. I am confident the rest of my body will be warm with the clothes I am taking.
Does anyone have suggestions on insulation layers to add? I understand that this is on the cold end of what I will see with a March start. I was only hiking for 5 hours in the cold yesterday, but I was cold enough that I want to upgrade my insulation.
I was looking at the Montbell thermawrap pants. They are a little pricey though.