I am assuming your stitches are under your breasts and i am also assuming your doctor has allowed you to shower thats why he has that waterproof rubber band above your stitches. For me i wasn’t allowed to shower for 11 days because of my aerola stitches and then he placed something like yours all over my breasts where my stitches are and asked me to shower with it to prevent as much water as possible from reaching my stitches and then he asked me to remove it and pat dry slowly