Thanks to my knowledge GAINED in practice in Industrial and Scientific field I can say that these reflectors are essential in ensuring workplace safety. The product`s design is durable and highly visible, making it easy for workers to spot even from far distances. Apart from being easy to set up, the pack also comes with ten triangles, offering unbeatable value for money. However, the reflectors are relatively lightweight, which means they can be blown away by strong winds in outdoor sites..See full review