Helmet Insert with Top Ventilation and PCM Cooling Key benefits Keeps your head cooler and more comfortable during long work shifts or outdoor activities. Reduces heat stress and maintains comfort in hot conditions, indoors or outdoors. Fits a range of hats and helmets thanks to its elastic, breathable design. What makes it work Top ventilation design: Elastic, breathable material at the top ensures optimal air circulation and adapts easily to different helmets and hat styles. PCM cooling technology: Built-in PCM (phase change material) provides extended cooling sensations to improve comfort during long periods of use while maintaining performance and safety across conditions. Reliable temperature control: Designed to deliver a noticeable cooling effect for up to two hours, helping users stay refreshed in high-temperature environments. Key features Function: Removable insert that adds ventilation and active cooling to helmets and hats. Compatibility: Elastic design conforms to various hard hats, cycling helmets, and casual hats; adapts to different sizes and shapes. Material: Breathable, elastic fabric combined with PCM cooling elements for passive thermal regulation. Performance: Maintains cooling effect for approximately two hours; improves wearer comfort during extended use. Practical applications Construction and industrial work: Use under hard hats to reduce heat buildup during long shifts in hot conditions. Outdoor sports and recreation: Helps cyclists, anglers, and campers stay cooler on warm days. Indoor jobs with heat exposure: Useful for workshops, kitchens, or any indoor tasks where sustained heat causes discomfort. Why customers choose this insert Simple to add to most helmets and hats for immediate improvement in comfort. Balanced design that combines ventilation and passive cooling without electronics or active cooling systems. Built for people who spend extended time in heat and need a reliable, wearable cooling solution.