Geology Rocks Trucker Hat Geology Rocks. Why is this design in this section? Because I like rocks that's why! And we're all on a big rock called Earth so you might as well admit that the study of the earth rocks! Product InformationUp for the long haul, our standard Trucker Hat features a resilient polyester foam front, and adjustable headband for the perfect fit. - Adjusts from 17" to 24"
- Crown measures 4"
- 100% polyester foam front, 100% nylon mesh weave back
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