30-35 years old. The overall length of a down jacket with a suit collar is longer than that of a general down jacket, and it has a collar design similar to a suit lapel. Capable and chic, it is a professional suit, suitable for working people aged 30-35. Down coat A coat filled with down stuffing is big and round. Down jackets generally account for more than half of duck down, and can also be mixed with some tiny feathers. Wash duck down, sterilize it at high temperature, and then fill it in clothes, which is the down jacket.