Biting bugs treat me as their gourmet buffet bar.  It's as if my scent calls out to them:  "Dinner time!"  Worse, I have a reaction to deer fly bites - swelling and crazy itching.  So my normal procedure has been to cover exposed skin with bug spray, and to spray heavy-duty Deet on my clothing.  The Zorrel insect shield t-shirt appears to work.  At least on the upper part of my body.  I've had not a single bite on my arms or neck when wearing the shirt.  I don't dare go out without dabbing bug spray around my face, as I've had facial deer fly bites that caused my eyes to swell shut, so I can't speak to its effectiveness around the face.  I usually wear long pants when working in the garden - wish they made women's shorts in the material.

I'll definitely order another shirt, when needed.

As an aside, I've learned that applying a paste of Accent (monosodium glutamate) on bites reduces swelling and itching.