The best back protector in the world period. ForceField Pro Sub 4 Back Protector was designed to withstand greater impacts than any other motorcycle back protector available. Upon impact, the Pro Sub 4 only transmits 3.38kN of energy which exceeds CE Test EN1621-2:2003 Level 2. Suitable for motorcycle racing, street riding or touring the Pro Sub 4 protects with the energy dissipating material Nitrex Evo which is highly efficient at absorbing energy as well as being soft, flexible and comfortable to wear with 3D Moulding Capabilities. Constructed with a removable and washable outer cover to give the rider the ability to keep the back protector clean and hygienic. The Pro Sub 4 is constructed in multiple layers that are stitched and perforated in such a way as to allow partial movement of the inner layers.