Cami Tank

It's really light and thin, which is what I want in a layering tank. The adjustable straps also allow for minimal coverage at the top, so if you're wearing it under a low v-neck to make it more work-appropriate, you can do that without looking like you have a full shirt underneath. The raw denim color was nice too. It's not a bright blue, so it can go with anything dark blue or even black. I usually wear XS with Threads 4 Thought, sometimes S in other brands. I went with the XS, and it was small enough to wear under other shirts and stay put but large enough to be comfortable and not add too much heat.