Like Equestrian Mom, I also use the Coloplast extended wear wafer #2833 with matching cloth covered pouch #13986, and it's been great for me! No leaks in 5 years!
I live in Florida where it's hot and humid 6+ months a year, so I shower every day and love to go swimming at the beach, in the pool, and at water parks. This wafer is like the Energizer Bunny of wafers... it lasts, and lasts, and lasts! I've never covered it when I shower or swim, and it has never leaked after getting wet. It's definitely worth giving it a try!
Cece