The fabric is a rayon plaid from Joanns. It is lovely but heed my warning, it's a pain to sew with. It grows and stretches and slips all over the place. So I stay stitched constantly, used five million pins. and tried not to say too many bad words.
The pattern itself is amazing, it's not a quick sew by any means but that ensures that the end result is fabulous. Kennis' instructions are clear and concise and full of lovely little details which come together to make a fabulous garment. Sizes offered are 00-22 and cup sizes A-DD so there is no more fussing with altering the bodice for the perfect fit.
The jumpsuit versions I've seen were pretty cute. I might have to try making one if I am brave enough. The pattern is on sale until Sunday and you can find it here. I highly recommend it, a perfect sew for spring!