I used these pants along with merino wool long underwear underneath to go skiing at Crystal. Temperature was low 30s and upper 20's at the top. These pants worked out great. My legs would be a bit warm at the end of the run but would cool off well. I was never cold walking around the lodge or on the lifts. Only gripe is I wish the two front pockets were easier to get into since my jacket was typically covering the openings up so I ended up stashing all my stuff in my jackets. Overall these are really great pants, definitely would recommend them.