Made of natural fibers, TTS, good feet size for long feet (not so easy to find!), super cute, super soft and comfy, not too light, not too heavy, great quality... let me see... what else... it doesn't tend to open between the snaps... I just wish there were more color options! I would buy them all. This is truly the footie perfection. And I am one picky mommy who will always find something she would change about every outfit. I of course strongly recommend it.