Yes, Crochet Braids can get wet. Yes,Crochet Braids can be shampooed, but be sure to use cool or lukewarm water. Yes, Human Hair can be used for Crochet Braids but its not dense enough to hold the knots. I don't use it. Yes, you can swim in Crochet Braids but it will need to be shampooed afterwards. Chlorine and Salt Water will dry out synthetic Crochet hair if it is not shampooed out. Crochet Braids generally last 6-8 weeks depending on your new growth.