This is their gauzy cotton maxi dress and it’s a really nice weight. It’s not sheer, it’s quite a substantial cotton but it’s lightweight for summer. It does run generously, this is the large and it’s a pretty loose fit, especially in the under arms. So keep that in mind, you may want to go down a size. I’d also suggest this dress in black too! Easy go to for vacation, can easily double for a cover up too. @Quince