This is J.Crew's
Solid Silk Garland Cami (item #11527). It also comes in petite (item #13345). Both retail for $88, and are numerically sized. It comes a pretty big variety of colors, too:
light pewter,
breeze,
classic navy,
key lime,
white sand,
ivory,
grey,
sweet lavender, and
amber. J.Crew describes the cami as such:
Silk habotai with a garland of delicate self-flowers that goes all the way around the neckline. We added a hidden button placket at the front for a sleek, seamless design. Self-ruffle collar. Import. Dry clean.
I have always liked this tank, but the price was always a bit too steep for me. Luckily I managed to snag all of mine on some type of sale or promotion! My PS gave this to me to try on in-store, and even though I already had it in the breeze color, I decided this might be a good chance to get some pictures for the blog, plus see how it worked iwith the Watercolor Floral Pencil skirt.
I initially tried this on in a size 4, as that is my regular top size, but it was too big. I tried on other sizes during our Boston JCA outing, and I actually had to size down two sizes to get this to look sleek, and not really blousey. Please note that the pictures below are a size 4 though.

The silk is a super smooth and delicate material. I actually found snags on pretty much everyone I tried on. I'm not sure if that's a fault of the execution, or just the nature of the material itself. The ivory color was also pretty sheer. Unfortunately, I didn't get to try this on in any other colors, so I'm reserving judgment on the sheerness of the tanks in general (for now).

I personally think the tank looks really sloppy untucked. That might be because it was too big, but I just didn't really the like the way it just sort of hangs. There are no darts or anything to create any type of waist or shape. Interestingly, I think it looks a little more pulled together when the bottom button is undone.
I think the tank looks much better tucked in. It still blouses nicely, but I think it just looks a little more polished.

I really like it with this skirt. I think the small floral detail on the collar of the cami works well with the more prominent floral pattern of the skirt.

I ended up getting this cami, in a size P2, at our Boston JCA event. It hasn't arrived yet, so hopefully I will remember to post an update when it gets here!
So what do you think? Do you like this cami? Which colors do you like it in? Do you like it tucked in or untucked? And how do you like it with this skirt?