As a Boston based rock climber, I spend much of my free time outdoors in dense New England forests, and I come in contact with all types of biting insects. I’ve felt the sting of black flies and the maddening itch of no-see-ums, and have been chased back to my car by clouds of swarming mosquitoes. I usually come back from my trips sore, scratched and bitten, my fingertips worn thin, but safe.