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How new rules and technologies are helping workers manage the heat  

By Ryan Barnes

How Modern PPE Combats Heat Without Compromising Safety
    On scorching days, safety helmets and other required PPE can feel unbearable —yet they remain non-negotiable on hazardous job sites. This creates a dangerous paradox: the very equipment that protects workers from immediate hazards can also increase the risk of heat-related illness. At the same time, foregoing safety equipment in extreme temperatures makes the job even more hazardous. According to 2025 data from the Construction Safety Council, heat-induced cognitive impairment contributes to approximately 22 percent of workplace accidents during summer months — making proper head protection even more critical during extreme heat.
    Traditional hard hats create problematic microclimates, trapping heat against the scalp and causing internal temperatures to exceed ambient conditions by up to 15°F (9.4°C), according to research conducted by Koroyd, a manufacturer of advanced impact technology. The effect is especially pronounced for electrical workers required to wear non-vented Class E helmets. Meanwhile, recent thermal imaging studies from the University of Michigan's Occupational Health Department show that standard hard hat interiors can reach temperatures of 110°F when outdoor temperatures are just 90°F.

Breakthrough Cooling Technologies
    ANSI Z89.1 Type II safety helmets with advanced ventilation systems are now largely replacing traditional hard hats, known as ANSI Z89.1 Type I, across many industries. Newer designs feature strategically placed vents that allow for continuous airflow while maintaining Type II protection standards, in addition to providing front, side and top head protection from angled impacts versus Type I hard hats that are rated to protect the top of the head only.
    Material innovations are also playing a key role in reducing heat. Expanded polystyrene (EPS) foam, while effective for impact absorption, acts as insulation against the head. New alternatives often feature welded cellular structures that are not only lighter but also offer venting, making them significantly more breathable.
    One such impact absorption technology company, Koroyd, released comprehensive heat stress research earlier this year. Its research found that a welded tube structure reduces the heat index inside helmets by up to 11°F (6°C) compared to traditional EPS-only safety helmets and hard hats. This reduction is associated with a 23 percent decrease in heat-related cognitive impairment among workers during eight-hour shifts in high-temperature environments.
    The study — which monitored 500 construction workers across six states during the summer of 2024 —found that those wearing helmets incorporating Koroyd technology, such as the STUDSON SHK-1 safety helmet, reported 37 percent fewer heat-related symptoms and demonstrated significantly better cognitive function during standardized workplace tasks. Brain temperature monitoring revealed that the technology helps maintain safer core temperatures by enabling more efficient heat dissipation from the scalp — a critical factor, as even small increases in brain temperature can impair judgment and coordination.

Comprehensive Cooling Solutions
    Furthermore, heat management extends beyond the safety helmet itself. Advanced cooling accessories now include helmet liners with phase-change materials that maintain temperatures around 70°F (21°C) for up to four hours per activation. The latest UV-protective neck shades feature evaporative cooling technology that activates when wet and delivers cooling effects for up to three hours— even in 90 percent humidity conditions.
    The newest generation of washable helmet components also addresses hygiene concerns. Antimicrobial treatments now last through more than 50 wash cycles, while quick-drying fabrics prevent bacterial growth even in humid conditions. This way, workers can sat cooler while reducing odor caused by sweat.

The Path Forward
    With increasing temperatures during the warmer months, forward-thinking organizations are now adapting with specialized heat management programs and more effective PPE. Many major firms now schedule high-exertion tasks during cooler morning hours and enforce mandatory cooling breaks when wet-bulb globe temperatures exceed 85°F. Some have also begun rotating workers between indoor and outdoor assignments during extreme heat events, where feasible.
    Taking it a step further, the most forward-thinking organizations treat heat protection with the same seriousness as fall protection or other critical safety protocols. By combining OSHA's heat illness prevention guidelines with advanced PPE — such as vented helmets featuring next-generation cooling technology and supportive accessories — employers can significantly reduce heat-related risks without compromising safety compliance.
    Afterall, research from the United States National Institute for Occupational Safety and Health (NIOSH) indicates that comprehensive cooling solutions can reduce a worker's physiological heat strain by up to 40 percent during an eight-hour shift in extreme conditions.
    Therefore, adaptations aren't merely about comfort — they're essential for protecting worker health, sustaining productivity, and ultimately saving lives. Fortunately, the hard hats that once seemed like an uncomfortable burden in summer heat are now evolving into heat-dissipating safety helmets that offer greater comfort with superior protection.