I couldn't get the women size 9 but I really like this style, so following their suggestion I bought the men size 8 and it fits perfectly. I noticed its also slightly wider which makes it even more comfortable for me. We haven't had much rain lately so I didn't get to test the waterproof feature, but so far I love how light and comfortable it is.
Thanks for sharing and for your kind words! We're so happy to hear that your Vessis fit perfectly. Happy puddle hunting :)