By using the unique coating technology, the insecticide of Yamei's LLINs（Yahe® LN）is bound in a resin coating that reduces the amount of insecticide lost during routine washing. The bio-efficacy test executed by T.E.C. Laboratory in France has indicated that the mortality (mosquitoes) and the knockdown rate of Yahe® LN meet the LLINs standards after 25 standard washes.