As good as they are hi-vis vests don't yet offer built-in edge protection
![hi-vis workers](https://d2vhdk00tg424t.cloudfront.net/MediaLibrary/s3/ubm-library/web/i/a/n/hi_vis_idiots_mn.jpg)
Mike Smith took this picture shortly before stopping the job. "The hi-vis vests are great. We can easily spot them as they fall off the roof and the hard hats will protect them from the pigeon droppings."