Meet the Aquatron C-Pal: a personal flotation device that can get you out of trouble and even help with swim training. It self inflates when you pull the red trigger. When inflated, you can wear the device around your neck. The C-PAL Titan has reflective tape, a whistle, and light beacon.
The C-Pal Neptune is designed to fit on your left arm and stay out of your way. Like what you see? You can find these on Kickstarter.