SkinnedCloth.worldVelocityScale
var worldVelocityScale: float;
Description

How much world-space movement of the character will affect cloth vertices.

The higher this value is, the more the cloth will move as a reaction to world space movement of the GameObject. Basically, this defines the air friction of the SkinnedCloth.
	GetComponent(SkinnedCloth).worldVelocityScale = 0.5;