The Slytech Flexi Vest Back protector is the most lightweight, thin and flexible back protector on the market. The stretchy nylon fabric keeps it close to your body to wear under clothing and the Flowmesh technology provides extra ventilation and comfort.  The Slytech 2nd Skin XT is a proprietary foam that intelligently adapts to the varying forces and impacts you may experience in the event of a fall - even low energy crashes. This allows the back protector to remain flexibile while you ride, but instantly harden when needed. The hexagonal Flexi pattern ensures that your mobility will not be compromised as the vest will mould to your skin and match every move that you make.  Features: Slytech 2nd Skin XT Flexi Progressive Impact Intelligence Toxic Free Zip Out Conforms to EN1621-2 Level 1 CB standard Colour: Black Slytech Back Protector Flexi Vest Zip