Crikey, my Nana would have said "You'll catch your death in that!".
I'll bet you'd get a side order of joggers' nipple too if you were wearing it 'sans undies', as I was planning on doing 😧
Edited to add, I'm retired though, so obviously wouldn't be wearing it for work, but I was thinking it'd be lovely for my trips to the garden centre, Home Bargains, the vet, the library etc.