I doubt it's waterproof, resistant, absolutely. The seabands are cloth "sweatbands" for lack of a better word, with a pressure point in them (help me out here, Doug). They look like sweatbands. No electronics. Google "ReliefBand" and you'll get it. One has a black face and one had a blue face (I have a blueface). They are for serious motion sickness. As I said, I am probably the token "wacko" case. I have used everything, I hate the after affects. I'm embarassed to say, I have used it in the car here, and in our boat. It is a 22 ft ski/open bow-rider :rolleyes: :rolleyes: