I don't often enter Old Navy (for many reasons) but a friend of mine had gotten this super soft/slouchy tank there recently so i thought i'd give it a go. . . holy shit tank tops. . . these are amazingly soft and sweeeet. and for $10 you should by a couple.  online here

they run realllly big so i actually got an xsmall and it fits loosely.  They also look Much better on than in this picture