Upgrade your Hikers Hat by adding the HyperKewl Evaporative Insert to it. The cooling material absorbs and slowly releases water through evaporation, supercharging the bodys natural cooling process.
Fit Guide:
| S | 6 7/8 to 7 1/8 |
| M | 7 to 7 3/8 |
| L | 7 to 7 5/8 |
| XL | 7 7/8 to 8 |
