K9 Advantix does it really repel Mosq. and Flies?

It advertises that it repels biting flies and mosquitoes, does it really do that or is it marketing BS? I took Sal and Athena to the "woods" and they both had belly bites from flies

I use frontline because it seems to work so great for tics and I off course use heart guard but neither prevent attacks.

Works here !

Really, repels Mosquitoes and Flies? I guess I have to try it.

Works well on my crew as well.

works better than frontline plus for us...