Brakes mean that the Pauncha of the Kachhera should be such that if the Gursikh was to hang upside down, the Kachhera does not slide all the way up the thigh. In other words the Kachhera should not be too loose near the lower thigh. Some wear Kachhera that does not cover their nudeness when they even it cross legged. Their Kachhera slides all the way up the thigh. Such Kachhera is not Gurmat Kachhera. The brakes must apply so that the Kachhera does not slide up.
Kulbir Singh