Traverrse High Visibility Safety Vest. This best selling hi-vis vest is a workwear safety essential, ideal for working outdoors in poor light conditions. This low cost, top quality high vis vest is a safety must have for all industry workers. The vest is made from a fluorescent saturn yellow polyester and with a black bias binding and velcro fastening. The vest has two 5cm high visibility strips around the body and one over each shoulder for safety and meets EN471 Class 2.