Although cleanroom garments are part of so-called workwear, unlike personal protective equipment, cleanroom garments are designed to protect the product or process under controlled conditions from contamination caused by employees or their personal clothing. Cleanroom garments are therefore the only filter between people (the largest source of contamination in the cleanroom) and the product to be protected. From a practical point of view, it has proven useful to understand and define cleanroom garments as a system. Many components of a garment concept interact and influence each other. In addition to the definition of the cleanroom fabric, the conditions on site in the cleanroom, the intermediate garments, the reprocessing and other additional factors must also be considered.