Categorizable as a sundress, but not a milligram of cotton in it. This is poly. I would not wear it in a casual way; as the poly would make it uncomfortable during summer weather; it is too sexy for the office, and I have maybe one occasion per year where I want to be dressy outside of work, and said occasion may or may not happen on a hot summer day. I would never wear this. I love it. But I would never wear it. I already have other things I might wear on the 0.5 hot summer days per year I want to dress up. Adieu, lovely little dress.