Does this bralette provide support?

Very little. It has no cups, underwire or padded band, so it is best for small to medium busts or as a layering piece. Shoppers wanting lift or shaping should look at a structured bralette instead.

How does the sizing run?

Small. The listed sizes follow Asian sizing, which typically runs one to two sizes below US sizing. Measure your bust and check the size chart, and go up a size if you fall between two.

Can I wear it as a top on its own?

Yes, the lace trim and open back are meant to be seen. It is sheer mesh, though, so plan on pasties or a layer underneath if you want more coverage.

Polyester mesh with lace trim. It is lightweight and quick-drying but less breathable than cotton or modal, so it suits warm days and short wear better than all-day wear.