I like the style of this blazer, but if you're looking for a blazer that is more casual than something you wear to work, this is not it.  The material is probably 90% polyester at least because it is stiff and crispy.  Rayon is a very soft and stretchy material.  I really doubt there is 35% rayon in this blazer because It's not stretchy at all.  I usually wear a small in jackets so I ordered a small and it was too small.  It looked like a child's jacket - that's how small it was.