Good morning, Whilst I am aware that there are fire retardant types available, does anyone have any idea as to the flammability of standard 100% polyester high vis vests / waistcoats. These are apparently made to BS EN 471, but I can't seem to find out what the fire retardant properties of these are (or are not). Many thanks for any info. Mike

From what I understand they are reasonably flammable/combustible, there have been over a number of years accidents involving hot works and clothing including HiViz melting and sticking to skin. If in doubt use flame / fire retardent types, even these will burn/melt to a degree but not as much and will protect operative more.