Bug resistant clothing is sold by Cabela, Orvis and others under numerous brands. It is expensive and there is a limited selection. All these companies are treating the clothing with Permerthin.
The US Military uses a spray on or clothing application kit which is much cheaper than buying pre-treated clothing.
Clothing application liquid and spray similar to the products used by the US Military costs under $2 a garment to treat clothing.
Please visit our blog for the full report and where to get the treatment kits. http://fishingwithdaughters.com/?page_id=428