In the utility industry, the reliance on flame-resistant (FR) and arc-rated (AR) garments has been a longstanding practice to safeguard workers against arc flashes and flash fires. Crafted from specially engineered, self-extinguishing fabrics and adhering to stringent testing standards, these garments play a crucial role in preventing or minimizing the severity of injuries.

You should know that single-layer FR/AR clothing does not trap heat or restrict heat removal any more than regular non-FR clothing does. A person primarily sheds heat through evaporation of sweat once the air temperature is greater than their body’s temperature. When the ability to sweat is restricted, however, or when it is lost altogether – due to physiological conditions, such as dehydration, and/or clothing that restricts it, such as rain gear – the possibility of heat stress increases.

Fortunately, advancements in textiles available in today’s FR/AR garments offer improved performance in extreme temperatures. For instance, moisture management is one advancement that assists in keeping the user comfortable. In hot temperatures, lightweight FR/AR garments allow more heat to be released because they provide less insulation. The open weave allows more air to pass through the garment and assists in moisture evaporation, which, when combined with the garment’s moisture-wicking properties, moves more moisture to the surface of the clothing for evaporative cooling.

In the ever-evolving landscape of FR/AR clothing, the quest for comfort has taken center stage. The latest innovations in this type of clothing are not just about protection; they delve into purposeful design and optimal fit to enhance wearer comfort. This article explores the industry’s advancements in creating FR/AR garments that prioritize both protection and comfort.

Heat Stress
Heat stress occurs when the body cannot rid itself of excess heat. According to the National Institute for Occupational Safety and Health, heat stress is a series of conditions called heat-related illnesses; these illnesses include heat rashes, heat cramps, heat exhaustion and heat stroke. Per NIOSH, “heat can also increase the risk of injuries in workers as it may result in sweaty palms, fogged-up safety glasses, and dizziness” (see www.cdc.gov/niosh/topics/heatstress/).

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For more information on lineman safety, check out some of our other posts on sustainable safety, high wind safety, FR/AR apparel, and heat related illness.