Very airy and light cotton. The only problem for me is that the neck is a bit large (it's a Small already), so I will have to fix that, but it's a great sundress and I love the texture, feel and the lovely blues.
Mom took a picture of herself in the dress and sent it to me so that's how I know she really likes it! She looked adorable in the dress as she added some red assessors to create an outfit that popped.