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.
My hat arrived the middle of a hot summer. It is incredibly soft. The colors are beautiful. It looks even prettier than it does on the website. I am looking forward to walks in ice and snow because I know if will keep me warm.