Life Vest Life vests can ensure your safty when you are emerging in sea activities. Factually, life vests are vital necessities even for people in a raft on board, because there's no absolute guarantee the raft will actually make it out of the plane and even then, life vests insure you will stay afloat long enough to get into the raft, no matter what condition you are in once you get on a boat or exit an aircraft. No matter how physically fit you may be, you cannot rely upon your personal ability to survive in the water without some form of additional floatation, especially so if the water is cold or you are injured. Shock alone can have such a deleterious effect that a person can be rendered nearly helpless. Therefore, life vests are people’s guardians of life.