At the risk of sounding like your mother, you need a warm hat for winter time.
Why this one?
Because it's conservative, inexpensive, and has no logos or fancy colors and patterns--which means it's exactly what the church wants for your missionary service.
Also, you can wash it (please do, from time to time).
Your mom is smart. Don't freeze her kid's little ears off in Iowa. Take a hat.
Made in China