GOGO Kid's Reflective Vest, For Running Cycling, Walking Safety Vest-NeonYellow-S Made of polyester and reflective PVC. Reflective vest makes your children visible in dark. Two-piece elastic waistband for comfortable size; easy to put on and take off. Essential safety equipment for walkers, motorcycle, running/jogging, bike/bicycle riding, utility repair, law enforcement, parking attendants, construction worker, surveyor, traffic crossing guard, police, EMS, Security. Size Info: Small: Length 16.1", Chest 30.7"; Medium: Length 16.9", Chest 32.3"; Large: Length 18.3", Chest 35".