To use this sweater, simply zip it up or down according to your comfort. You can wear it on its own during mild autumn days or layer it under a jacket when it gets colder. For the thumbhole cutouts, just slide your thumbs through for extra warmth. When it comes to care, it's best to follow the washing instructions on the label. Usually, a gentle machine wash in cold water is recommended. Avoid using harsh detergents as they can damage the fabric. After washing, reshape the sweater and lay it flat to dry. This will help maintain its shape and softness. Don't forget to store it in a cool, dry place to keep it in good condition.