As a mature man.... I have some first-hand experience with dehydration. It isn't something we generally talk about publicly. But staying properly hydrated can be difficult-ish for men 50+. I had a bathroom scale I used for a period that measured my moisture/hydration level by running a slight current/signal through my bare via my bare feet (it wasn't felt). I am not sure how effective it was... I still managed to dehydrate myself. I am sure Rowan will do a better job of meeting this new challenge than I have. I now count mileage, drinking every four miles (6.4K). Yeah... it means peeing more than I'd like. But that's not the worse thing to live with.