Control Freek has a new and unique tennis racquet that aims to prevent sweaty palms by including an air-conditioner in the handle. I suppose this is big news for the Tennis world because sweatty palms will lose you matches and hurt your grip.
No batteries required. It was specially designed to capture air in the handle every time you swing the racquet. That air comes out through the holes and onto your palm, hopefully improving your game. I’m not sure that this would work, but if you’re the sweattiest palmed Player on the court it will cost you $275 to cool off.