This is a high quality, hand made, dust and water splash proof shroud, designated to fit a particular model. Shroud comes with a zipper, which allows to access the internals of a model i.e. connecting/disconnecting  batteries and turning a model on/off without removing a shroud. While taking a break between the running  stints the shroud can be unzipped to allow ESC and motor to cool quicker.  Shroud is made from the highest quality materials. That is why it is strong, durable and efficient. The open  area of a material is more than 50% of total shroud surface, so it ensures a very good airflow in order to  keep the model electronics cool.