Used these pants for a week-long bikepacking trip in CO and NM during the recent rain/flood episode...good test! They kept me nice and dry in rain and even when working hard and sweating up Indiana Pass at 11,900'. Pack small and light. They were the only pants I took, could have used some long socks for chilly evenings. The Medium fit well without a lot of excess (32" waist) and although they rustle a bit they don't bind or chafe while riding.