Protective clothing is where it's at for mosquitoes. It always amazed me to see people slathering chemicals all over their arms at the end of the day, then ten minutes later they're putting on a long sleeved shirt because the sun was going down. Dense weave uncoated nylon is the stuff. Running wind pants and windbreaker jacket. Material breathes but the skeeters can't poke their biters through the stuff. Get a cotton hat and put your bug repellent on the rim of the hat instead of your skin. If they're really bad wear the head net. You can open the armpit seams in a windbreaker and sew in a patch of mesh for ventilation.