A hat that is indispensable for measures against summer sun and heat stroke. However, on the other hand, it also has the disadvantage that the inside is steamy and hot.

I found an item at a drugstore that would alleviate such worries. Its name is "Hat Cool Sheet".

Hat cool sheet

"Kiribai" products that are familiar in Cairo products. Five pieces were included in one box, and the purchase price was 424 yen (excluding tax).


To use it, just stick the sheet on the inside of the hat that hits the forehead. The three-layer sponge absorbs sweat and heat and dissipates it to the outside, keeping your forehead cool.




A slightly soothing sensation with menthol. It is not a chilly cold like a cooling gel sheet, but a slightly comfortable cold.

The point is to wear a hat deeply. If the part where the sheet is attached does not hit the forehead firmly, you will not get a feeling of coldness. Use it for a hat that fits snugly, not a loose hat.

Also note that the effect cannot be obtained unless sweat or heat is emitted. It is a counter type that gives you a feeling of cold only when you sweat or the heat stays in your hat. This is a big difference from the cooling gel sheet.

Instead, the duration of the effect was long, and the same effect as on the day was obtained the day after application. Menthol may weaken, but if you use it in your daily life, it will last for a few days.


Just by cooling your forehead, the heat of your head caused by the hat will be relieved. Please use it for outdoor leisure and going out where you can't take off your hat for a day!