I just got back from a weekend of training. One application of 3M Ultrathon Friday morning. Between 9am and 11pm I received 1 bite on my arm and 5 on the small of my back just above my belt...where I neglected to put any. I didn't think about my shirt coming up (I was on my hands and knees most of the time).

I even mixed it with cream sunscreen yesterday. I was worried one would defeat the other but I had no bites and no burns.