Some people just won’t wear a PFD no matter how much you reason with them. The Kingii inflatable bracelet is the perfect compromise for the stubborn boater in your life. It’s not a PFD, but it can assist in a situation where you might wish you’d put that PFD on. A quick tug of the lever and a bag inflates that will help you stay afloat. $90 at Kingii.com.