The Spine VPD System Comp Back vest is a dedicated back protector for Serious ski racers or skiers who want the ultimate performance back protector. Based on POCs patented VPD (Visco-elastic Polymer Dough) technology, which adapts with body heat to fit each unique user, the molded back protector is extremely flexible and conforms to the highest, Level 2 (1621-2) certification. The woven fabric uses monofilament threads and a Kevlar reinforced barrier to establish resistance and anti-penetration around the spine, which provide maximum abrasion resistance. The design also provides a highly versatile protector with extreme ventilation channels and flexibility ensuring that the vest is extremely comfortable to wear all day. Designed with a race fit, the protector also features low bulk thanks to seamless glue technology and minimizing all additional fabric.