I've camped on many hot mosquito filled nights, I had read that mosquitoes don't byte through double layer hammocks but wasn't sure if i trusted it. On a canoe trip several years ago I set up camp near a marsh on a brutally hot and humid night, the air was thick with clouds of angry mosquitoes that made the woods hum loudly all night long.
It was so hot i moved my under-quilt to the side and slept in only underwear, nothing but the 2 layers of my warbonnet XLC hammock between my back and millions of hungry mosquitoes. The next morning I didn't have a single byte on my back and I now sleep just fine even when I hear them buzzing right behind my head all night.