1. Safety:The Swim Bubble provides reassurance for swimmers by adding extra visibility and floatation, in case you cramp up or simply need rest. 2.High visibility:Its brightly color inproves your visibility,which helps you be seen by speed boats and jet skis to avoid getting decapitated. 3.Dry bag:Designed with dry bag on central,you can store the things you need on it. 4.Adjustable waist belt:Comes with a adjustable waist belt,which can be adjusted to your comfortable length.