So, what would you wear to climb a ladder?

So, what would you wear to climb a ladder? I ask as it's now the subject of a court case in Toronto. Eight Muslim women are complaining that UPS (a parcel delivery company) won't allow them to wear full-length dresses whilst climbing ladders in their warehouse.

Source:  http://www.thestar.com/News/GTA/article/535278

UPS say that the women can wear trouser suits under shorter dresses if they wish, but apparently the women are concerned that you might be able to discern a calf under the trouser suit.

I never cease to be amazed what nonsense people can dream up in the name of organized religion.