The ERB C421 Coolerz Hard Hat Crown Cooler is activated by water and helps to keep your head cool underneath your hard hat while you are hard at work and provides 5-10 hours of cooling relief. Easily attached to your hard hat suspension, this hard hat crown cooler features hook and loop adjustment and a comfortable polyester construction for superior fit and comfort in the warm weather.

• Adjustable hook and loop attaches to hard hat suspension
• Provides 5-10 hours of cooling relief per soaking
• Comfortable polyester mesh outer with HyperKewl fabric inner and water repellent nylon liner
• 6 pack

The Coolerz C421 Hard Hat Crown Cooler uses an advanced evaporative cooling system with a water management system to maximize cooling, while minimizing moisture transfer to the wearer for:

• Enhanced cooling capacity
• Managed and directional evaporative cooling release
• Cools longer than other evaporative systems
• Reduces wetness to wearer
• Water repellent nylon inner
• Quilted nylon outer

Coolerz with Hyperkewl products utilize a unique polymer chemistry to achieve rapid absorption and stable water storage. The chemical formulation creates enhanced evaporation and longevity. Users can expect cooling fabric to provide temperatures that are up to 15 - 20 degrees (F) cooler than the ambient temperature. The exact temperature difference will depend on humidity, exposure to airflow, and environmental conditions.

Easy to use. Simply submerge in water for 1-2 minutes, then gently remove excess water.

Garments can be rehydrated as needed.