Klein Tools Cooling Helmet Liner

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Cooling Helmet Liner cools up to 2 hours when wet. Once activated cools up to 30 degrees below body temperature. Mesh fabric at crown increases airflow. One size fits most. Machine washable. Cools instantly when activated, up to 30 degrees below body temperature. Wicks away sweat from the head for up to 2 hours when wet. Activate / Reactivate: soak with water, wring out excess water, snap 3-5 times to activate. Mesh fabric at crown expands airflow for maximum breathability. Front fabric is 92% Polyester, 8% Spandex. Back fabric is 100% Polyester. Machine washable and reusable. Show more