The USB LED Reflective Safety Vest is designed to keep cyclists highly visible during nighttime rides. It features 4 highly reflective white LED lights in the front and 4 highly reflective red LED lights in the back with 3 different flashing modes, and is made of waterproof and EL Flashing nylon fabric. Optional 1 pair armbands also included. Fits true to size; delivery takes 18-22 days.