The nClothShade node attributes determine the physical characteristics of an nCloth object such as how the cloth reacts to forces like gravity and wind, as well as how it moves when it collides with other objects like a character mesh.
When the nodes Enable attribute is on, the current mesh behaves like an nCloth object and it is included in its Maya® Nucleus™ solver’s calculations. When off, the current mesh behaves like a regular polygon object and it is not included in its Maya Nucleus solver’s calculations.