To use your Oslo Truffle Fedora Hat, simply place it on your head and adjust the inner band to fit comfortably. You can wear it on various occasions, like casual outings or semi - formal events. When it comes to maintenance, keep it away from direct sunlight for long periods to prevent color fading. If it gets dirty, use a soft brush to gently remove dust. Store it in a cool, dry place, preferably on a hat stand to maintain its shape.