All snaps on the front of the garment should be snapped to prevent exposure of static generating personal garments to sensitive products. The snap located at the neckline can be left unsnapped for comfort, if it is determined that products will not be exposed to static generating personal garments at that height.

proper-esd

Long sleeves of personal garments worn underneath an ESD garment should be pushed up or rolled up above the elbow to assure that they will remain under the sleeve of the ESD garment. The adjusting snaps on the ESD garment sleeve hems can be used to help prevent exposure of personal garments to sensitive products.
The sleeves of the ESD garment should always remain extended to the wrist area to prevent the exposure of excessive arm hair which can generate static.