What should I do if I wear a hat to flatten the bangs in front of my hair in winter?

You need to bring your hair wax, take off your hat and go to the bathroom. Just use hair wax to catch the fluffy feeling.

It's easy if you have a fan. Dip your hands in some water, wet the roots of bangs, lower your head, let your hair stand upright, blow dry with a fan, and cover your face with your hands when blowing, otherwise your face will be very dry.

Looking straight up, bangs are very fluffy. I always do this.