The chest light has bright front light, red rear light, and reflector straps that make it easy for the car drivers to spot you from distance. The lightweight adjustable belt has a flexible strap to ensure comfortable wear.
Question: How should you wear lights when running?
Answers: Remember to light the rear of your body, too. It's also important to remember to put a light on the back of your body so that you are visible from both front and rear. People often wear a flashing red light on the back of their bodies because flashing red lights are associated with the taillights of cars in traffic.
Question: Are 800 lumens bright enough for running?
Answers: The darker your run, the more light you will need. ... In these conditions, we suggest a light with at least 500 lumens, but options that offer up to 500 lumens or more are also available.
Question: What size is the chest band?
Answers: Not sure the exact size but it will easily fit a man with 34 chests or a Woman with 34 w/ DD. It's adjustable.