Will the courier steal the courier's down jacket?

No, couriers are strictly trained. Stealing couriers is illegal. A coat filled with down in a down jacket is huge and round, and down jackets generally account for more than half of duck down. At the same time, it can be mixed with some tiny feathers, cleaned and disinfected at high temperature, and then filled in clothes, which is the down jacket. Down jackets have the best warmth retention, and are mostly worn by people in cold areas, and are also commonly used by polar investigators.