How does the UV-filter and the controlled release system work?

The ZeroFly® shelter has several different built in UV filters. Some of these filters protect the plastic material and the others protect the insecticide. The UV filters that protect the insecticide even have the ability to follow the insecticide, while it is immigrating to the surface. The insecticide on the surface will slowly degrade from the external exposure, mainly sunlight. The built in UV filters will slow down this process, but will not be able to stop it. In order to compensate for the loss of insecticide on the surface, the ZeroFly® shelter has a depot of insecticide in the central layer. The insecticide from the central depot will migrate towards the surface.