It is from Additions by Chico's.  

. The shimmery gray color and sleeveless design make it perfect for any occasion, whether it's a casual day out or a business meeting. The scoop neck and pullover closure add to its comfort and ease of wear. 

 Made from a blend of polyester, spandex.  

Chest measures 37" around plus stretch.  Shoulder to hem is 24".  

It was worn once or twice and actually looks new.