The World Health Organization estimates that 370,000 people drown each year, and according to the United States Coast Guard 82 percent of those people were not wearing a life jacket. The Kingii is an emergency life preserver that you can strap right to your wrist in case you don't feel like wearing a life jacket. It's lightweight and portable design makes it much less bulky than a life preserver. To use it simply pull the lever on the wristband and the flotation device will inflate within seconds, thus floating you to the surface of the water. The Kingii uses capsules so you don't have to buy a new device every time you use it. Simply replace the capsule and hop back in the water and try not to drown this time.