Even though we pride we ourselves making pretty awesome looking and feeling clothing, our Insect Shield technology is serious, world class stuff. As such, we have serious, big girl registrations and testings.Our product is actually registered with the US Environmental Protection Agency (EPA) as a result of a lot of very smart people doing years of research and testing. The registration process designed to evaluate a proposed product to ensure it will not have adverse effects on people or the environment. And that is actually pretty cool. Insect Shield products have been rigorously evaluated on multiple levels including the chemistry, the application process and the final consumer product. Our Insect Shield treated apparel is registered under EPA Reg No 72843-2.