Engineered for racing applications. The result of the Assos obsessive quest to reduce volume to the maximum, while still providing protection and functionality. This product concept, another smart ASSOS invention for riders who race. This ultracompact shellVest gives not only emergency chest protection but also added security, thanks to its oversize reflective appliques. The emergency shellVest has been designed to contour to your upper body and provide a quick and easy-to-wear solution in racing conditions (putting it on while riding). Everything but the the absolutely essential has been eliminated to provide a piece of super functional, micro-volume cycling equipment. For long fast descents (racing chest protection) and or permanently in winter training rides or in low-light conditions for added security due to the reflective appliques. Another little ASSOS invention that makes a big difference. Supercompact, Assos recommends storing it permanently on your bike in either the second water bottle holder (inside a used half-cut waterbottle) or inside the saddle pocket.