I feel the medium is just a tiny bit too small. However, it is sweat proof during regular exercise on dry land. lem4 pro I even emailed UIN from their website asking for the best shoe size me and they still have not answered me back, that was 2 weeks ago. These are great if you have super narrow feet. lem4 pro Good as new. lem4 pro It fit wonderfully, it really complimented my figure and I planned on ordering more BUT then I went out to the park and 3x in my day the zipper split (we would have to unzip all the way down and then rezip to get it to close again). good quality and definitely worth the money. ---Update. lem4 pro If you have things you just want to hide away that you don’t use on a daily basis, this is your cabinet. Not a deal breaker, but to me thin = lower quality.
lem4 pro