My first pair of Jambu shoes were J-41 water ready. I had a problem with the tread. I sent an email and within 2 days I got a reply. Of course, they no longer had my shoe style left because they sell out quickly. They let me pick out a new style, so I picked Cherry. They are very light and feel extremely comfortable. I wear an 8.5 and they even make my feet look smaller. I find myself trying to wear outfits each day just so I can wear these shoes. Great Job Jambu!