509's team of athletes, consumers, designers, and saleSmall)en have at some point had to go wrong fast while riding in the mountains, or out on the trails. The luck or fate that follows is out of our hands, but what 509 can help with is how you come out the other side. Our new Protective Vest is designed to help protect your core using CE certified, non-newtonian fluid, energy absorbing, material. Designed with chest, and back protection, it is designed to be work under your jacket for more protection and comfort, and with less bulk.