This is Gap's Polka-Dot Lace Cami (item #594861) in lilac glaze. This item is available in-store and online, but I believe there are some more colors in-store than are available online (such as navy blue with white dots). It retails for $19.50. Gap describes the cami as such:
A classic fit gets cool with lace detail and playful polka-dots--perfect to layer under breezy blouses or, try it on its own for a versatile summertime look.
This is definitely just your basic cotton stretch cami, with a pretty lace detail, and in a cute print. The fabric has some stretch in it, and is super soft and smooth, which is nice.
I don't really have a whole lot else to say about the cami. I stopped wearing camis just as tops awhile ago, but I think this is a nice layering piece, and will work with a lot of different colors and outfits.
I initially left this at the store, even though it was on promo for 2 for $30. Later that night, I was shopping online and noticed they were only $10 online, so I picked up a few polka dot ones in different colors (in the larger sizes).