Great material - alarmingly thin, but are not transparent after sweating them through during 67 hot yoga classes in October! I don't know how durable they will be (the brass ends come off in the wash and the stitching on the waistband comes loose) but survive repeated wear well. They stay put, but the pockets turn inside out waaayyy to easily when your upside down. Looks pretty terrible if you don't notice afterwards and you're demonstrating the next pose with your pockets inside out.