We've been at Glen Lake for over a week now and the best part is I believe we have "proven" the Itch Guard to work. No swimmers itch all week. This morning my 9 year old grandson spent about 30 minutes in shallow water trying to catch minnows and did not put the itch guard on. He came in and began to complain his legs were itching. He took a shower and applied poison ivy gel and seemed to recover quickly. But, we've become believers and will use it faithfully from now on. Thanks a million.