Nontoxic Horsefly Patches and Deer fly Patches
These patches have an attractant in them the flies want to get to. Attacking flies land on the patch. When they do, they stay. The little buggers are no longer a nuisance flying around your head or biting you or anyone else. You can use these on dog collars too. One patch will last 1-3 days on your cap or until it'sclogged with bugs! In the package they will last 5 years.
