In his oldest meaning burlap stands for degradation. People carried clothes from burlap to show that they were less worth than dust. Hence, also the expression go ‘to bag and cinder’. Today burlap in the dream probably represents rather feelings of the humiliation. The dreaming has degraded himself by his own action.
Burlap can also stand for remorse. The dreaming maybe has the feeling to have humbled himself. At the same time, however, he would like to show to the world that he regrets his actions or action.
In old time it belonged to it to display publicly grief, and burlap served as means to show the emotional loss and the spiritual poverty of the affected persons.