The MTI Moxie is a woman specific PFD. It has pads that can be inserted into the PFD that support the bust and fill in the space between chest and vest. The sides are open and the lower back is mesh, making this PFD very comfortable.
My old vest would get pushed by the seat back and end up irritating my neck. Not my Moxie. It also comes with a tethered safety whistle. Lastly, it closes with 3 clips, not a zipper. My vest is a L/XL, with a wide adjustment range.