Belt clip is designed for taking light things on the surface of clothes but without any pockets , two belts folded with a U shap on the one end and a small gap on the another end , a belt is sticked with pocket that can hold things and another half belt is inserted on the belt like on your waist , then , the the pocket is fixed on the belt and some things can be put in that ; There are many belt clips are used such for mobile pocket and waistband etc . following is a example for mobile pocket