Fluorescent strips can be sown on to most materials, I remember being issued with a fluorescent tab in the building of Connah's Quay power station, which we all wore under our overalls, we were of course stopped, and questioned, and we said overalls as the name suggests go over all, and are to stop any loose clothing from getting caught in machinery, and health and safety required we wear them, and as long as they were prepared to issue a statement to the union to say overalls are no longer required, we would be happy to stop wearing them, as they are rather hot.
We were issued with overalls with fluorescent strips instead. Main material was cotton.