You can change your sweater after 3 days of wearing it. 　　1. You can take the sweater to the dry cleaner directly. 2; 2. Wash the sweater with a special wool cleaner according to the washing label; do not use hot water when washing; if you have a tumble dryer at home, choose the wool washing mode; 3. Hand wash with a special wool cleaner, do not use too much force. Remember: Do not tumble dry or dry at high temperature. When drying, it is best to use a drying basket, and it is best to dry in the shade, do not expose to the sun, if the sun is strong, the outer layer of the cover sheet sun.