I got these shorts for my teen son in xs. Normally he wears size sm in Mens Nike sweatpants, but the Mens Nike shorts always seem to run large (he is tall and skinny). These shorts have so many great features - lots of secured pockets (zippers and snaps), dri fit material, vented legs and an adjustable waist. These are his go to outdoor active shorts - fishing, playing sports, working out...The only complaints he seems to have is that even in an xs, these are not slim fitting shorts - they fit like a baggy board short and the dri fit material is a bit stiff which makes them uncomfortable to lounge in.