If you don't soak your line Vs once it's been in the water for a while it just seems to cast better, wrap better and sink better once it's wet. I saw those things at the Essex carp show, good idea but not for me at that price, they were pricey I thought.
I did use some sweatbands for a while that I would soak but I left them in the car or somewhere once and didn't bother doing them again.