SwimWays Sea Squirts Life Jacket They are fun and kids WANT to wear it. Sea Squirts look like fish for a serious reason. Each design has a flexible fin on the back to help kids get carried away with creative play. It's a brand new idea and there's nothing like Sea Squirts on earth. Swimways Sea Squirts Life Jackets are Type III U.S. Coast Guard certified as a Personal Flotation Devices Fin folds over when leaning back for active use The arm-hole sizing insures a proper comfortable fit so the strap between the legs doesn't have to be too tight. Grab me fin can be used as swimming aid