What's New, What's Hot is Travel Weekly's look at useful and fun travel gadgets, edited by Joe Rosen. First up, Sharkbanz 2: Obviously, this product is not for everyone, but if you are among those who surf, spear fish or just like to swim in the ocean, this product is a shark repellant worn around an ankle or wrist that its manufacturer Mako says uses ''patented magnetic technology researched and tested by marine biologists'' to discourage shark attacks.