I be a woman 's size 7 and I buy a pair of these in a small man 's size because I hear the woman 's Rainbows be too narrow . these fit really great . I can not testify as to whether or not they mold to you foot -lrb- like the leather one -rrb- because I have only have they a day , but they do not seem to have the really horrible , painful break-in period like the leather one do . these be comfortable to wear right out of the package and do really well when they be wet -lrb- no slip and slide -rrb- . my fiance have a pair of the leather rainbow that he be be wear for 7 year and keep knock I for get a rubber pair but I have a feeling that this pair will be much more comfortable for I .