I've been getting Banana Boat, just because I know it's gluten free (for dd). It seems to work pretty well for us, but we haven['t tried it in the water. Last week we found ourselves on the way to the park without sunscree, and I got a CVS brand sunscreen that says it stays on through water for 80 minutes or something like that. The formula was similar to the Banana Boat that we usually use.