I just spent a week on hood canal which is a mucky sink down a foot or more tide flat when the tide goes out. I forgot my rubber boots do these were my only option. I spent hours with my feet slipped all the way to almost the top in muck and crossing small channels of water completely submerging the shoe and my feet were almost completely dry bi couldn't believd it. I tried 5 or 6 pairs of shoes before I got these and they were by far the most comfortable (and most expensive).