The Flak Jak IMS Chest Protector utilizes our IMS padding system on a clear polycarbonate body, with our original Nytrolyte padding and net suspended floating shoulder system. Includes plastic sleeved metal rivets and 1.5" airloc buckles. Included, is our original Suspended Shoulder system. Engineered as a cantileaver which keeps the plastic shoulder cap off of your shoulder. In the case of an impact, the energy is dispersed across the whole area rather than one spot. This design is featured in our Flak Jak IMS and 1000s.