This product is more closly related to loungewear than swim trunks. I will not stay on you durring activity such as diving or even quick movements through water, and it has no draw string around the waist. The string that is shown only covers the crotch area and is mainly non fuctional. If you were to draw the string up and attempt to make it snug you will have miles of string left over and one realy big tie off. I had to tuck the excess into the trunks.
It looks great when you are just wearing them around but don't expect to be using these as athletic swim wear.