The POC Spine VPD FIS Racing Back Protector: POC has used a new compound (VPD) and technology to design their most shock absorbing back protector. VPD (Visco-Elastic Polymer Dough) and Polyurethane foam create a highly dampening material that is soft, comfortable and conforming to the individual user. However, upon impact the VPD protection functions progressively adapting itself to the force of the impact by absorbing energy and stiffening. VPD Spine is designed to pass the rule and regulations of the FIS.