H&M soft midi open back grey tank dress

Pictured is the smallest darker mark on the front which I’m not even sure is a light stain or is part of the grey cloth, but wanted to picture anyways! It’s so soft and adorable. I’m only giving it away because I am breastfeeding and will be for a long time and it’s not nursing friendly! It has slots on the side that are approx a foot high Dress is long enough that the slits don’t venture up into uncomfortable territory