The second big advantage for the late Victorians was the introduction of the tea gown.
"The tea gown was almost like a dressing gown, but much more chic. It was loose and had sort of this drapery business. It was the only garment a woman could wear in the company of men that didn't require corsets. So they could get back from shooting or whatever the event had been, take off their corsets, rest, get up, put on a tea gown over a loose chemise — it was perfectly decent — go downstairs, have tea and chat before gong, gong, gong! Then they'd go up, get into their corsets again and get ready for dinner."