Firstly let me say - I love the colours and the autumn feel of the piece. The titles is also wonderful - I didn't know what to expect at first.

A few things that bug me though - her whole body pose, the fabric and the way it is placed lead my eye to the right side. The only thing that breaks the flow is her hair - if the wind is blowing to the right, there's no way it could simultaneously blow to the left as well (unless for artistic purposes but here it just breaks the flow of the piece and makes the eye wander).

Another thing is the backlight you added is wonderful and really adds to the piece but the fabric isn't all opaque, it should have shown a little bit of light go through at the very bottom. Also the light spot on her cheek is a bit confusing for me - there's no sign of frontal light from the right on her other than that (and on that note she has a little bump on her neck outline that looks unnatural).
As for the disintegration; I love the idea and it is quite well done, but I'd expect there to be loose strands or something. What I'm trying to say is I'd have loved to see it disintegrating less evenly across the fabric, but I still think it's pretty awesome
(also, the bottom part needs more holes and less shiny particles because the light hits from the back)

One last thing - I love the sharpness of the grass and stones, it really adds to the piece, but that stone to the right seems to me as if it could've been pushed more to the right corner of the frame so that it wouldn't distract the image so much and give the image better framing.

Otherwise though, as I said before, beautiful piece, very well manipulated and I love the composition and colours