How to use: Put the swim diaper on your baby just like a regular diaper. You can use it alone in the pool and add a normal diaper over it when out of the water. When changing, simply undo the wrap - style design. Note: The bias trim might look different from what's shown. Sizes are important, so choose according to your baby's weight. For maintenance, just wash it after each use and let it dry. The quick - drying nylon will get it ready for the next swim in no time.