Applications.This safety vest can be used in a number of situations. The vest is ANSI 107, Class 2 compliant. From surveyors and engineers, to construction workers, this vest is appropriate for any jobsite. It can also be used by joggers, walkers, and traffic control operators. Safety Features The material of the safety vest with LED lights is in a bright fluorescent color for high visibility during the day. It also has reflective strips for high visibility at night. The strips go completely around the waist and from waistband to waistband over the shoulders. This ensures 360° visibility even when it’s dark or in inclement weather. As an added feature for extra visibility, the vest comes with 16 LED lights that can be switched on and off. It’s easy to turn on and off. All it takes is the press of the button on the lower left front of the vest. The vest comes in a choice of colors: orange with yellow reflective strips, or green with silver reflection strips. Materials The LED light vest has a waist of about 51″ and a height of 23.2″. Made from 100% polyester mesh, this high visibility vest is fire retardant. It has reinforced seams. There are 3 Velcro closures, one in the front and one on each side of the vest. This is for easy donning and removal, and adjustment for your comfort. This vest is one-size-fits-most. There is an inner pocket that holds the battery casing for the LED lights. It requires 2 AA batteries.