74% nylon 26% elatane. Very comfortable, I own a couple pairs in different colors. Loose outside layer with a another fitted spandex part on the inside. Inside shorts have a small pocket as well as the waist band which has a folded pocket on back side (they don't zip). They are crinkled now but get wavy/flatten out when washed. I just liked the other colors when I got a bunch but I wear the others a lot! This is a medium and have the same in size large listed for sale.