ESD (Electrostatic Discharge) caps are specialized headwear designed to prevent electrostatic discharge in environments where static electricity can damage sensitive electronic components. The caps are typically made of synthetic materials, such as polyester or polypropylene, that are treated with a conductive material to create a path for static electricity to dissipate.

ESD caps are commonly used in electronic manufacturing, assembly, and repair environments where workers are in close proximity to electronic components. The caps are designed to fit snugly around the head to prevent static electricity from building up on the hair and scalp, which can cause electrostatic discharge.They are typically colored blue or white, which are the standard colors used to identify ESD protective clothing.

ESD caps are an essential component of electrostatic discharge protection in electronic manufacturing environments. They are used in conjunction with other ESD protective gear, such as ESD smocks, gloves, and shoe covers, to provide complete protection against electrostatic discharge.