The early history of permethrin development involved tests on mosquitoes conducted by the US Army and Air Force. Tests showed that when lightweight uniforms were treated until moist (approximately 3 ounces) the permethrin alone (0. 5% solution) gave 97.7% protection from mosquitoes and 99.9% protection when used in combination with deet (33% solution). Two detergent washings did not diminish mosquito repellent and killing action of permethrin-treated uniforms.
An interesting side note: The effectiveness of permethrin can be shown in the following report highlight that was reported in a very matter of fact statement. During testing in the Everglades, "Mosquitoes were also repelled because of the side-stream effect caused by numerous treated uniforms within the same general location. This required that the test site be moved to locate more mosquitoes!"