It feels like a cotton tee shirt with stretch. The pattern reminds me of many of the different doodles American Girl uses.
I think that once it is paired with nice sandals, it will have a finished look. Different AG stores have used different shoes.
Last year's Spring pwp was a short dress-maybe why they went with a longer dress. I appreciate the modesty for a ten year old like Lea.
I think the dress suits Lea's personality.