In the precedent=setting cases, the workers are engaged in occupations that require the use of special clothing for protection or sanitary purposes. This clothing is, I believe, cleaned and maintained at the work site by the employer and is not suitable for wear outside the workplace. These workers therefore have to dress at home in their ordinary clothes, then change into the special clothing at work, and at the end of their shift, change out of the special clothing into their ordinary clothes, which they then remove eventually at home. So for them donning and doffing their work clothes represents time in additio to normal dressing and undressing. Moreover, they typically work in large plants where the changing rooms are some distance from their actual workplace.