- Wearing it with a non-FR outer layer. Even if you are wearing FR clothing, a non-FR outer layer can still ignite and burn. In cold weather conditions, workers should wear FR outerwear as well.
- Wearing it with a non-FR synthetic under layer. T-shirts worn to help with moisture management may be made from synthetic materials that are not flame resistant. These materials can actually melt to the skin.
- Rolling up sleeves. This should be avoided because it leaves arms exposed. Instead, workers should wear FR clothing made from lightweight, moisture-wicking fabric.
- Unzipping coveralls or unbuttoning shirts. Like rolling up sleeves, this practice also leaves the skin unprotected.
- Not tucking in shirttail. Heat and flames can travel under the shirt. Workers should look for FR clothing that has long shirttails to prevent this from occurring.