It doesn't matter how good a rider you are. At some point, things will go wrong. Safely push the limits with the 509 R-Mor Protection Vest. Lightweight and low-profile, this stealth vest is designed to disappear under your jacket while providing CE certified impact protection to your chest and back. The secret to 509's R-Mor padding technology is non-Newtonian fluid that reacts upon impact while remaining more flexible, comfortable, and lighter weight than protection of the past.