The bottom portion of this legging is made of a very lightweight fabric. It's super breathable and very comfortable, but not what I expected (though I am not disappointed at all!) They are very comfortable and cute; I really like them! My only concern on these leggings is that the pull-through string that gives the bottom portion of the leggings their ruching is already tied off and sewn shut, so if you want to pull it tighter it can stick out a little too far and feels awkward; I'm afraid I'll trip on it. That being said, it's not a major concern because the length of them is just right.
Kerstin recommended this style