The tank top is cotton, elastic, and at a super price! The first time I wore it, the sleeves were slightly tighter at the end, but the next times it was just fine!

Just received it. It is stretchy, the only maybe negative thing is that if someone wants to wear it as a shirt, the fabric is somewhat transparent.
The quality seems very good for its price. It will also show in time...
I got it in all colors.
Very good for its price, it can also be worn as a shirt!