Yes, those are the ones i am talking about.There are basicly 5 types of flotation devises
Type 1- rough water, long rescue time these are self righting
Type 2- calmer water, inshore calmer water shorter rescue time, most are self righting
Type 3-inland waters, short rescue time most are not self righting, ski jacket type
Type 4- throwable rescue type
Type 5- specialized pfds, full floatation suits, work pfds and auto inflate vests.
if it is a manual inflate jacket it counts as a pfd Type 3 when not worn
if it is a auto inflate/manual inflate model it is a type 5 not any good unless it is worn.
The best type to get is the type 3. if you become unconscious in the water they will keep you face up. ski jackets will not do this.