a piece of clothing, usually made from wool, that is worn over other clothes and that is like a light, soft coat without a lining (= a layer of material sewn inside), or like a long cardigan for wearing outdoors

A coatigan is the ideal wardrobe solution for unseasonably cool summers and surprisingly mild winters. 对于不合季节的凉爽夏日和令人惊喜的温暖冬日，开襟羊毛外套是理想的着装选择。