I couldn't have lived at Portland Roads without Mosiguard. If you have sand flies cover every inch with mosiguard, it needs to be a barrier, they are not like mossies they don't care about smell. And do it first thing in the morning and about 3 in the afternoon, before they bite you, you don't feel them for 20 mins I learnt a lot living across the road from mangroves at Portland Roads, near Lockhart River, the northern-most town on the east coast of Australia. With regular repellant I found I scratched old bites so the repellant would come off and the sand flies find any bare patch, but mosiguard relieves the itch and stays on better.