There used to be a product called Wild Hair.  I don't see it in the marketplace here, but maybe if you do some searching.  Not sure who the maker was, but that's what it was called, and looked very similar to that hair in your picture.  It came with tons of morphs that could make it look wind blown, and all sorts of stylings. With the morphs it came with, it could easily recreate that look.  Someone in the Poser forum might know where it is. Good luck.