I bought two of this shirt, one for my grand-daughter and one for myself as we were getting ready to go on safari in Africa and my grand-daughter in particular has a bad reaction to bug bits.  My hope was that the shirts would keep those darn bugs away and keep the bites to a minimum.  Imagine my surprise when I did not get one bite during 3 weeks in Africa and my grand-daughter only got three.  I attribute this to the pre-treated shirts that kept the bugs at bay, as we were definitely in bug country. I would definitely encourage those who have issues with bugs to consider purchasing these shirts.  They helped us and eased my mind about our chances or contracting malaria during a once in a lifetime trip.  I know that I will purchase more of these shirts for wearing around the yard when doing work.  In case I haven't mentioned it, the color is delightful.