Heat Stress
Heat Stress Products: Cooling Gear, Hydration & Job Site Coolers
Heat illness is a serious and preventable occupational hazard. OSHA's general duty clause and agency heat-specific guidance require employers to protect workers from heat-related illness when working in hot environments — indoors or outdoors. The four recognized heat illnesses in order of severity are heat cramps, heat syncope, heat exhaustion, and heat stroke. Heat stroke is a medical emergency with a fatality rate of up to 63% if untreated. OSHA's recommended heat illness prevention program covers three elements: water, rest, and shade — supplemented by cooling PPE and electrolyte replenishment for high-exertion outdoor work.
Safe-Fast stocks heat stress prevention products across three subcategories, primarily from Ergodyne, Sqwincher, Igloo, and Rubbermaid:
- Clothing — evaporative and personal cooling products worn on the body:
- Ergodyne Chill-Its® Cooling Bandana — evaporative polymer-activated bandana/headband. Soak in water 2–5 minutes; stays cool up to 4 hours. Re-usable.
- Ergodyne Chill-Its® Cooling Hard Hat Pad w/Neck Shade — attaches to hard hat suspension via hook-and-loop; lightweight cooling acrylic polymers with UV neck shade.
- Ergodyne Chill-Its® Cooling Towel — super-evaporative PVA material that stays colder than ambient temperature when wet. Instant cooling relief for head, neck, and shoulders.
- Pyramex Hard Hat Terry Cloth Sweat Band — absorbent terry cloth snaps onto hard hat suspension; keeps sweat out of eyes during hot work.
- Weldas SweatsOpad™ Suspension Band (2-pk) — all-fleece cotton sweatband reduces irritation from hard hat suspension straps during hot weather.
- Coolers — insulated water jugs and coolers for crew hydration stations:
- Igloo Seat Top Water Jugs — 5-gallon seat-top design with Ultratherm® insulation; holds ice up to 3 days; drip-resistant spigot and push-button drain.
- Rubbermaid Coolers — extra-thick insulation; screw-tight lid; drip-resistant spigot for controlled dispensing at crew hydration points.
- Hydration — electrolyte replenishment products:
- Sqwincher 2.5 Gallon Mix — bulk electrolyte powder mix; gluten free, low sodium, high potassium. Add to water, stir, and serve from a cooler at hydration stations ($6.13 per packet).
- Sqwincher Qwik-Stik ZERO (10 tubes) — single-serve sugar-free/zero-calorie electrolyte powder. Pour into a 20 oz. water bottle; no measuring required.
- 4 oz. Cone Cups — 25/pack or 200/case disposable cups for hydration station use alongside coolers and water jugs.
For bulk orders of cooling towels, coolers, or hydration products for seasonal crews, call Safe-Fast at 1-800-723-3620 or visit our Spring & Summer Promotions page for seasonal deals.
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Heat Stress Prevention — Frequently Asked Questions
Heat exhaustion is a serious warning that the body's cooling system is struggling. Signs include heavy sweating, cool/pale/clammy skin, rapid weak pulse, nausea, muscle cramps, weakness, and dizziness. Move the worker to a cool environment immediately, loosen clothing, apply cool wet cloths, and provide fluids if conscious.
Heat stroke is a life-threatening emergency. Signs include high body temperature (103°F or higher), hot/red/dry or damp skin, rapid strong pulse, confusion, loss of consciousness, and the worker may stop sweating entirely. Call 911 immediately. Cool the worker rapidly by any means available — cold water immersion is the most effective. Do not give fluids if the person is unconscious.
OSHA recommends that workers in hot conditions drink approximately 1 cup (8 oz.) of water every 15–20 minutes — about 24 oz. per hour — rather than large amounts infrequently. Thirst is a poor indicator of dehydration; by the time a worker feels thirsty, they may already be 1–2% dehydrated, which measurably impairs physical and cognitive performance.
For work lasting longer than 1 hour in hot conditions, water alone may be insufficient — electrolyte replacement is needed. Sqwincher provides sodium, potassium, and other electrolytes lost through sweat. Avoid caffeinated beverages and energy drinks, which can increase dehydration risk.
Evaporative cooling products use the physical process of evaporation to lower temperature. Water evaporating from a surface absorbs heat energy from that surface to change state from liquid to vapor — this is the same mechanism as sweating.
Chill-Its® Cooling Towels use a super-evaporative PVA (polyvinyl alcohol) material that holds more water and evaporates more slowly than cotton, maintaining a surface temperature below ambient air temperature for an extended period. Cooling bandanas and hard hat pads use polymer crystals that absorb water and release it slowly as they evaporate.
These products are most effective in low-humidity environments. In high-humidity conditions, the air is already saturated with moisture and evaporation slows — active cooling methods (shade, air movement, cold water immersion) become more important.
Any worker can develop heat illness, but risk is significantly higher for:
- New workers — the body takes 7–14 days to acclimatize to heat through a process that increases sweat rate and reduces electrolyte loss. New hires and returning seasonal workers are at the highest risk in their first two weeks.
- Workers in full PPE — arc flash suits, chemical protective coveralls, and heavy FR clothing significantly reduce the body's ability to cool itself through sweating and convection.
- Workers with medical conditions — heart disease, obesity, uncontrolled diabetes, and certain medications (diuretics, antihistamines, antidepressants) impair heat tolerance.
- Outdoor workers in direct sun — solar radiation adds 10°F to the effective heat index calculation.