The tag and other customer reviews said 95% Rayon, 5% Spandex for the Mocha color, but I think this is actually polyester.  I am very cautious about not wearing petrochemicals (polyester, nylon, etc.), and I believe this manufacturer is misleading about their material.  The fabric feels like polyester (kinda of stiff and plasticy instead of soft and buttery like Rayon).  A burn test on some stray fibers gathered from the main material melted (this indicates a petrochemical like polyester).  Rayon is supposed to come from natural materials (like wood or bamboo cellulose) and Rayon will not melt, it would burn instead.  I have found many manufacturers selling on Amazon are not truthful about their materials, and so I do a fiber test on anything suspect; this would not be the first time that even the clothing tag lied.  The good news is this is under the free return policy.

A tad larger than expected.  5'2", 130lbs, 34 B bra size, size 6-8 or M in outerwear tops.  This M is a tad on the large side for me - it would work ok, but it would be more flattering if it were a little more snug in the waist.  I don't know if a size down would work or not - I did not try again due to the material.

Other than the material issue, this seems like a nice business casual garment that would work for a cool temperature office.  The look of the material makes it not business professional in my opinion (looks a little shiny and cheap, though so bad that I wouldn't have worn it casually).