Pros: Great swim diaper at a reasonable price.
Cons: Only comes in a bright blue so you'll need a dark swimsuit to cover it.
I purchased this swim diaper last summer for my disabled son. I found it on line at http://www.urincontrol.com. The company mailed it promptly and Zach was using it less than a week after ordering. It is soft and silky and fits nicely under a regular pair of swim trunks.
The small adult fits a 22"-28" waist closing with both Velcro and a tie. This swim diaper opens like a diaper and wraps around the front securing with Velcro. It is very well constructed.
A young woman could use this under a one piece but it might show through a close fitting swimsuit. I am very pleased with this product and highly recommend ordering it.