I bought these for my trip to Asia this summer. It'll be very tropical and humid and the culture is conservative so I need some pants that I won't sweat through or die in from the heat. I live in TX so as soon as I received these I put them on and went outside. First thing I noticed is the great fit around the butt, thighs, and waist. They're stretchy and comfortable but the real test was still to come so I went outside. It was 7 p.m., 98, and HUMID. I was fine. My legs still felt a breeze as I walked and they didn't sweat. The pants didn't stick to my legs and the fabric didn't feel heavy or constricting. The fit around the waist and butt is better than Columbia Omni-Shield pants but prAna is $10-$15 more expensive. The only thing I don't like the bottom flare these have. They have a is the very wide flare at the bottom. It covers my entire foot and  I wear a size 9 shoe! However, I can pay to have the flare altered at the bottom so I will keep them. One last thing, I got these in Thistle and I love the color.