You can actually find this information in the deal description! I have copied and pasted it below:
"These all-natural cooling towels instantly lower body temperatures up to 20 degrees without requiring refrigeration. To activate, first rinse the towel in cool water, then wring it and shake out the excess moisture. The highly absorbent fibers will deliver a cooling sensation that lasts up to two hours, bringing you instant relief after workouts, long days in the sun, or failed attempts to ride a fireball."
Jul 18, 2013