Adopting 1000D  waterproof  and flame retardant nylon or Cordura, and with heavy-duty nylon webbing and stitching.
MOLLE system is equipped around the vest, so more equipments can be attached to the vest. 
The shoulder and back can be adjusted by hook&loop. 
Two pockets are set on the front and the rear respectively, used to insert ballistic plates (10 inches*12 inches) with various thickness. Both sides also have pockets for the small plates.