Patagonia Women's Reversible Tank Top. 100% Organic Cotton. Foliage Green and Lime Green (the logo appears on the dark side along with a tag to cut or not).
Size L - true for a 10-12. See measurements.

It's a heavy-ish stretchy cotton, and opaque - great for modesty.

Feel free to ask any questions and check out my other activewear and closet clean out items in similar sizes.