A liquid treatment for Lifesystems mosquito nets. As a pyrethroid, Ex8 will act as an extra layer of protection on your net, repelling insects and killing any that come in contact with the net. Ex8 is unique in that it is a long-lasting treatment which lasts for up to 2 years or 35 washes of the net. Each bottle will treat one net. Active Ingredient(s): PERMETHRIN. Repels: Mosquitoes, midges, bed bugs and other biting insects.