Onyx Cool Cap, Sky Blue, 58 Degrees
![](https://s.turbifycdn.com/aah/yhst-11545572856523/onyx-cool-cap-58-khaki-49.jpg)
The 58° Onyx Cool Cap (hat NOT included) is made with a specially formulated plant-based cooling phase material (PCM) that safely and comfortably fits inside a construction hard hat or baseball cap to cool your head and protect against heat stress. Provides soothing relief for headaches and migraines.
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