The Ultimate Cool Hat Even the intense direct sunshine will be stuck! "Cocagel" Jockey Cap that cools like the shade of a wood: Heat shield against heatstroke. As seen in the shade of the tree, this hat reflects not only the light but also the heat back to your body temperature to -4°F (-10°C). This Cocagel hat is sandwiched with a heat shielding material (Cocagel), which protects your head and skin from intense sunlight that causes skin to be damaged due to global warming. Not only UV rays, it also cuts 99.2% of near infrared rays, which are said to reach deeper skin than UV rays. 4-way slits for excellent breathability. You can also wash it by hand, so you can use it clean anytime. The built-in adjuster makes it convenient to adjust the size. -Detail- ■Label Size: Head Circumference 22.6 - 22.0 inches (57.5 - 56 cm), Height - 6.7 inches (17 cm), Brim Length - 3.7 inches (9.5 cm), Front Gathering Part: Approx. 3.7 inches (9.5 cm), Weight: Approx. 2.6 oz (75 g). ■Material: Cotton - 80% Rayon.