After trying a few different pair of hiking/adventure pants I decided to try some slim fitting stretchy's. The Orion pant fits absolutely perfect. Snug enough where the pants don't "swish" while walking which may be suttle at first, but at long distances it really gets under my skin lol ... yet they are not so tight that it looks like spandex. After putting them on for the first time it really was if I couldn't tell that the pants were on. Its almost as if they became one with my lower body. Lol and after a 7 mile hike I still wanted to keep them on. Very rugged, durable and extremely comfortable. I even tried out a scree slide with em and they didn't even budge. Best pants I own. They are slightly warm so anything above apprx 90 degrees f would be a little hot. Perfect for mild to slightly chilly hikes.