I use an anti-static wrist sleeve, is anti-static overalls superfluous?
This is a common misconception. Most clothes are insulated or have insulating properties (depending on the amount of sweat in the clothes, thickness, cloth, number of layers, etc.). The charge will not move on the insulator, it will remain on the insulator for a certain period of time (usually a few hours or a few days) after neutralization, or neutralize with the ions in the air (the time when manual intervention can be Down to a few seconds).
Therefore, your sleeves, belts, etc. may carry a voltage of several thousand volts (the electric field it generates is very strong for the surrounding conductors), which may cause charges to be induced on nearby isolated conductors. Therefore, the staff needs to wear anti-static work clothes to shield the insulated clothes to minimize the static field generated by the clothes. It should be noted that you must put your sleeves into your work clothes