Combat rucksacks mainly used in the field training. 
Backing comfortable, practical strong, can carry body armor, bulletproof helmet and other wild training equipments, to be convenient for all the policemen, designed the primary-secondary  backpack.when you execute a task ,you can separable the primary bag. 
Use the secondary bag alone, so as to reduce the weight, in crease the combat efficiency, is a  suitable practical equipment for our policemen execute the task outdoor.