Under Armour Gray Sweater

Under Armour Gray sweater with Hearts Logo in purple. Sweater is Brand New with tags. Size Youth Small. The back of the sweater has two small black stains. I don’t know what it is. I am assuming is maybe something that smeared while moving it into storage. It looks like it can come off I just didn’t want to mess with it since I’m not knowledgeable on material and chemicals.