These are running shorts from UNDER ARMOUR. They are free size, but they are a bit small for me, who usually wears a Uniqlo L size, so I think they are suitable for those who wear M size or smaller. The waist has elastic and a drawstring, so they won't slip down. I've worn them once or twice, and there are small pills visible on the inside. I'm decluttering. Feel free to ask any questions.