The altitude gradually increases, and it suddenly becomes cold. Also, it starts to rain, and the hand covers I bought beforehand are very useful.
Not only do they prevent the cold, but they also prevent rain from getting on the gloves to some extent, so they seem useful not only when it's cold but also when it's raining, as they can be used together with a raincoat.
I used them a little when I was riding an old motorcycle in Japan during the winter, but it seems they are useful even in the summer.
