This men's down sweater vest is very versatile. You can wear it over a shirt during a cool day, or layer it under a thick coat in colder weather. When wearing, make sure the vest fits properly for maximum warmth. As for cleaning, it's best to follow the care instructions on the label. Usually, a gentle machine wash with cold water and mild detergent is a good option. Avoid using bleach or harsh chemicals. After washing, dry it on a low - heat setting and fluff it up to keep the down in good shape. Store it in a cool, dry place, preferably in a breathable bag to prevent moisture build - up.