widely used in communication,sanitation,transportation,mining and gardening SIZE:L,XL,XLL,XXXL, 50PCS/CTN 60*50*30CM, net/gross weight:9/10kg Mainly applies to the personnel of police, Highways, traffic commander, highway maintenance personnel, motorcycle and bicycle motorists, dark light, workers, etc. need to light warning local workers. Police, Highways, traffic commander's HV reflective Vest