life-jacket, life-belt. 救生衣, 救生帶

Syrian migrants wear life-jackets and life-belts before boarding a dinghy to cross the Aegean Sea to the Greek island of Lesbos from the Ayvacik coast in Canakkale, Turkey.
February 28, 2016
http://www.voanews.com/media/photogallery/february-28-2016-day-in-photos/3211757.html