The stretch and tech of these pants are fantastic. These will likely be the "every time adventure pant" I was hoping for. I received the pants today, size small as ordered. The thighs and waist we're tighter than I'd want. Length was perfect. I'm 5'10", 155-160lbs, have an athletic build. I normally wear a size 30-31 in most other brands of pants, and based on height and weight size measurements, I thought I'd go with small.
But when I measure the actual location of the waist that Velocio gives, it's closer to 32 than 31, and my hip measurement was 38, so I'd be fitting more toward the medium than small based on their sizing dimensions. Lesson learned: always measure first! :)
Medium should fit perfectly, and I'll update when I get them!