It's not really solid, it just looks that way because you need to remove the mesh covering the top and bottom, of course. Next step is to place it over the stock Poser OBJ that it is supposed to fit and using that as a guide and cut out the parts using detach polygons. Give tham the exact names of the Poser parts underneith, and cut as close as you can to the same seams. Then just find an existing Poser item of clothing that has the same parts, save the item by itself as a new item and edit the CR2 file to point to your new object. Don't ever use the .phi generating part if you can help it! It doesn't work very well, and you have to do all the bending prameters.