As with all Forcefield Body Armour® the Forcefield Pro Sub 4 back protector has RPT (Repeat Performance Technology) ensuring continued and consistent protection even after multiple impacts. The award winning Forcefield Pro Sub 4 back protector was designed to withstand greater impacts than any other motorcycle back protector currently available and at just 3.38kN transmitted energy when subject to the CE test EN1621-2:2003 Level 2, that aim was achieved and certified by testing specialists SATRA.