Aerie's Hannah bra is nearly identical to the Sunnie Demi Coverage lightly lined bra. The Hannah that I have has a band that tapers to a narrower height than Sunnie, but, other than the fact that Hannah bras are exclusively made of cotton, it is the same model as Sunnie Demi. It's nice to have a white cotton bra on hot summer days. This wears well under white t-shirts and it's a soft, super comfy bra for everyday wear. It's very basic, and it works exactly the way I want my boring white bras to work.
The bra is excellent for those with shallow breasts and wide roots. I bought this bra in Charcoal Heather, Oatmeal Heather, and Light Heather. I bought these the same time I bought Blakely because I had heard that Blakely is also great for those with shallow breasts. Compared to Blakely in the same size (30C), Hannah comes in more at the top, so it can give you quadboob if you don't really have shallow breasts. Hannah also has wider cups (I had to return Blakely because it was cutting into my breast tissue). Overall, I love this bra, which I why I bought three. It is comfortable and disappears under t-shirts. Like most other Aerie bras, you can only shorten the straps about half way. This hasn't been a problem for me as of yet. This bra also comes with hooks on the straps to turn the bra into a racerback. I have not tried this as yet.
Love this bra style, very comfortable. Needed this color so it would not show under white shirt when we were on vacation. Accidentally bought a size too big, did realize until after the fact and didn't have time to return. Only worn once, in great shape.